I'm stuck when Add libraries in my project in Eclipse. I am following this link official android development website http://developer.android.com/tools/support-library/setup.html#libs-with-res and I do exactly what it says but I get errors for some reason.Here how it happends:
1.I download support libraries from SDK Manager.
2.I import them with existing Android Code into workspace and I press on the both .jar files Build Path>Add to Build Path.
3. Then on that project (made in step 2) I configure Build Path and I check both .jar files and uncheck the Android Dependencies and I click finish. Everything is okay for now.
But here comes the main problem=>
4. I press on my main project (myfirstapp) properties and click Add and select the libraries after that I press Apply and lots of errors raise up like R cannot be resolved to do variable and my R.id from /gen folder suddenly dissapear
I add now some screen shoots to make it better for you.
Sorry I have no reputations for posting images. Please copy links below
first image
second image
third image
fourth image
All my Codes: MainActivity.xml
package com.example.myfirstapp;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
public class MainActivity extends ActionBarActivity {
public final static String EXTRA_MESSAGE = "com.example.myfirstapp.MESSAGE";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment())
.commit();
}
}
public void sendMessage(View view) {
Intent intent = new Intent(this, Displaymessageactivity.class);
EditText editText = (EditText) findViewById(R.id.edit_message);
String message = editText.getText().toString();
intent.putExtra(EXTRA_MESSAGE, message);
startActivity(intent);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
return rootView;
}
}
}
fragment_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<EditText android:id="#+id/edit_message"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:hint="#string/edit_message" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/button_send"
android:onClick="sendMessage" />
</LinearLayout>
strings.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">myfirstapp</string>
<string name="action_settings">Settings</string>
<string name="edit_message">Enter a message</string>
<string name="button_send">Send</string>
<string name="title_activity_displaymessageactivity">Displaymessageactivity</string>
<string name="hello_world">Hello world!</string>
</resources>
Displaymessageactivity.xml
package com.example.myfirstapp;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class Displaymessageactivity extends ActionBarActivity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Get the message from the intent
Intent intent = getIntent();
String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);
// Create the text view
TextView textView = new TextView(this);
textView.setTextSize(40);
textView.setText(message);
// Set the text view as the activity layout
setContentView(textView);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.displaymessageactivity, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(
R.layout.fragment_displaymessageactivity, container, false);
return rootView;
}
}
}
fragment_displaymessageactivity.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.myfirstapp.Displaymessageactivity$PlaceholderFragment" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/hello_world" />
</RelativeLayout>
Things I have tried so far:
1. Reinstall Eclipse and Java
2. Redownload libraries from SDK Manager
3. Clean the Project.
4. Make all my xml files starting with lowercase (but the MainActivity.xml and Displaymessageactivity.xml must start with uppercase)
I tried my best and I am stuck here forever. I am very frustated from Google :/
Every help is very appreciated and welcome!
Add the library to your application project:
In the Project Explorer, right-click your project and select Properties.
In the category panel on the left side of the dialog, select Android.
In the Library pane, click the Add button.
In step 3, notice that in the Library pane, you should see that the appcompat_v7 already be added (it's added automatically when you create your project follow MyFirstApp instruction, because you have already chosen minSdkVersion=8, not 11) (your second image).
So remove all the added libraries in the Library pane before adding your library (so in your third image it only has android-support-v7-appcompat in Library Pane), then the R.java will not disappear.
Related
I have a navigation drawer and against each item within the drawer there is one fragment page. I want to implement tabbed swipe within one fragment. How do I do that.
Here's my code after clicking to one navigation drawer fragment page. I want to implement the tabbed view within this page. What's the way?
//Code
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v7.app.ActionBar;
import android.support.v7.widget.Toolbar;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
/**
* A simple {#link Fragment} subclass.
*/
public class SalesFragment extends Fragment {
private Toolbar mToolbar;
public SalesFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
setHasOptionsMenu(true);
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_sales, container, false);
}
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.toolbar_menu, menu);
super.onCreateOptionsMenu(menu, inflater);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.add_user) {
return true;
}
if (id == R.id.barcode_scanner) {
return true;
}
if (id == R.id.search_overflow) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
//and here is the layout xml page
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.soumya.possystem.SalesFragment">
<!-- TODO: Update blank fragment layout -->
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Sales page"
android:textSize="40dp"/>
</FrameLayout>
You can created tabbed fragment page viewer by using Android Studio Activity Gallery. Just follow the below steps and create in half minute.
-> File -> New -> Activity -> Choose the type Tabbed Activity
-> Choose Navigation Style Action Bar Tabs (With ViewPager)
Enjoy Coding !
As suggested in other threads, I am following a tutorial in order to learn the basics of android application development. However, the code for the DisplayMessageActivity class as given here contains several errors:
container can not be resolved or is not a field (line 16)
Fragment cannot be resolved into a type (line 37)
View cannot be resolved into a type (line 62)
fragment_display_message cannot be resolved or is not a type (line 62).
Wile trying to fix this error by my own a new error popped up out of nowhere at line 55: Class requires API level 11 (current min is 8);android.app.Fragment
According to another SO entry this is due to an ADT version mismatch. But this entry does not explain how to fix it.
How can this tutorial code be fixed so it compiles - or is there a 'working' tutorial available somewhere with actual working examples?
Here is the code so far:
package com.example.testapp;
import android.app.Fragment;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class DisplayMessageActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// setContentView(R.layout.activity_display_message);
//
// if (savedInstanceState == null) {
// getSupportFragmentManager().beginTransaction()
// .add(R.id.container, new PlaceholderFragment())
// .commit();
// }
// Get the message from the intent
Intent intent = getIntent();
String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);
// Create the text view
TextView textView = new TextView(this);
textView.setTextSize(40);
textView.setText(message);
// Set the text view as the activity layout
setContentView(textView);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() { }
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_display_message,
container, false);
return rootView;
}
}
}
Here is the content of the file res/layout/activity_main.xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<EditText android:id="#+id/edit_message"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:hint="#string/edit_message" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/button_send"
android:onClick="sendMessage" />
</LinearLayout>
and here the content of the file res/layout/activity_display_message.xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.testapp.DisplayMessageActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/hello_world" />
</RelativeLayout>
Addendum:
I tried to include missing libraries, and now most of the errors turned into a grey 'X' (which, I guess, is now a mere warning and can be ignored? Should it be fixed? If so, how?)
The error regarding fragment_display_message stays as error, probably it is not defined (contrary to the example given.)
I was working my way through the same tutorial and I ran in to many of the same issues as you. One in particular had me stumped for an hour. I finally figured it out and here you go.
The error that the both of us got was the following:
fragment_display_message cannot be resolved or is not a type (line 62).
The fix is relatively simple, the reference to fragment_display_message should get changed to activity_display_message. Your new line in DisplayMessageActivity should now look like this:
View rootView = inflater.inflate(R.layout.activity_display_message, container, false);
I'm trying to work through the "Start Another Activity" tutorial but, having worked through the whole thing (twice), the app still refuses to return the text entered in the textbox - it always returns "Hello World".
I've tried to figure it out, and suspect it might be something to do with the fragment_display_message.xml, in which there is an EditText calling the Hello World string. But really I have no idea.
Any help would be appreciated. Here's the code:
MainActivity.java
package com.knargle.streetiteatit;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
public class MainActivity extends ActionBarActivity {
public final static String EXTRA_MESSAGE = "com.knargle.streetiteatit.MESSAGE";
/** Called when the user clicks the Send button */
public void sendMessage(View view) {
// Do something in response to button
Intent intent = new Intent(this, DisplayMessageActivity.class);
EditText editText = (EditText) findViewById(R.id.edit_message);
String message = editText.getText().toString();
intent.putExtra(EXTRA_MESSAGE, message);
startActivity(intent);
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container,
false);
return rootView;
}
}
}
fragment_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.knargle.streetiteatit.MainActivity$PlaceholderFragment" >
<EditText android:id="#+id/edit_message"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:hint="#string/edit_message" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/button_send"
android:onClick="sendMessage" />
</LinearLayout>
DisplayMessageActivity.java
package com.knargle.streetiteatit;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class DisplayMessageActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Get the message from the intent
Intent intent = getIntent();
String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);
// Create the text view
TextView textView = new TextView(this);
textView.setTextSize(40);
textView.setText(message);
// Set the text view as the activity layout
setContentView(textView);
setContentView(R.layout.activity_display_message);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_display_message,
container, false);
return rootView;
}
}
}
fragment_display_message.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.knargle.streetiteatit.DisplayMessageActivity$PlaceholderFragment" >
<EditText android:id="#+id/edit_message"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:hint="#string/hello_world" />
</RelativeLayout>
In your DisplayMessageActivity.java file, you are calling setContentView twice which it-self is overwriting the first line of code. Currently your code looks like this:
setContentView(textView);
setContentView(R.layout.activity_display_message); // Delete this line. As this line of code appears in your java file, it is overwriting the 'text' you entered with the default 'hello world' message
It should be just like this:
setContentView(textView);
The setContentView is being called twice in DisplayMessageActivity. Remove the second one:
setContentView(R.layout.activity_display_message);
In your DisplayMessageActivity:
// Set the text view as the activity layout
setContentView(textView);
setContentView(R.layout.activity_display_message);
You call setContentView twice, which just overwrites what was already there. Remove the second setContentView.
You can follow the answers from both Andrew and Rajesh. But the fact that you have defined a layout fragment_display_message and I am sure you want to use it. In that case, all you need to do is get rid of the code to dynamically add the TextView and the correspodning setContentView and leave the second setContentView that uses your layout. Once done, you get the reference to your EditText and set it's text to what was sent in the Intent.
Remove these lines from DisplayMessageActivity :
// Create the text view
TextView textView = new TextView(this);
textView.setTextSize(40);
textView.setText(message);
// Set the text view as the activity layout
setContentView(textView);
You were attempting to set the message in a new text view which is not part of your layout file. And then setting that text View as the ContentView of your layout. That seems like a convoluted approach. Instead try the following :
After the setContentView(R.layout.activity_display_message); line, add these lines :
EditText editText = (EditText) findViewById(R.id.edit_message);
editText.setText(message);
This way, you use the existing Edit text element in your layout file to show the message. Your original code never replaced HelloWorld in this element. That is why it always shows you HelloWorld instead of your message.
I'm trying to perform a simple navigation action using Intent.
I'm using the complete ADT bundle which includes eclipse, SDK and ADT plugins, so no need to configure ADT separately in eclipse.
1.) I started by creating two layouts named activity_main.xml and test2.xml.
2.) Corresponding java files are mainActivity.java and test2.java.
3.) Now activity_main.xml contains a button with id = "click" . Clicking this button should navigate to next activity i.e test2.xml.
4.) The code in mainActivity.java is as below
package com.example.test;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.os.Build;
public class MainActivity extends ActionBarActivity
{
Button btn;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_main);
if (savedInstanceState == null)
{
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
btn = (Button)findViewById(R.id.click);
//Listening to button event
btn.setOnClickListener(new View.OnClickListener()
{
public void onClick(View arg0) {
//Starting a new Intent
Intent nextScreen = new Intent(getApplicationContext(), test2.class);
startActivity(nextScreen);
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container,
false);
return rootView;
}
}
}
5.) But when i did so the findViewById(R.id.click) showed error saying "click cannot be resolved or is not a field"
6.) Eclipse suggested me to create a field click in id which i did. It modified the R.java file but it did not help. Though the errors were gone but the emulator threw error saying "the application has stopped"
7.) My manifest.xml file is as below
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.test"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.test.MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".test2"
android:label="#string/app_name" >
<intent-filter>
<action android:name="com.example.test.test2" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>
8.) Now my test2.java code is
package com.example.test;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;
import com.example.test.R;
public class test2 extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.test2);
TextView txtName = (TextView) findViewById(R.id.textView1);
txtName.setText("This is test2 activity");
}
}
Even here at setContentView(R.layout.test2) it shows the similar error as "test2 cannot be resolved or not a field" where as setContentView(R.layout.activity_main) did not show this error
9.) My fragment_main.xml code is as below
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.test.MainActivity$PlaceholderFragment" >
<Button
android:id="#+id/click"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:layout_centerInParent="true"
android:layout_marginLeft="14dp"
android:layout_marginTop="65dp"
android:text="#string/button" />
</RelativeLayout>
10.) My test2.xml code is as below
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/textView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="second page"
android:layout_gravity="center"
/>
</LinearLayout>
The error displayed on running the application is as below
a.) [2014-04-15 18:39:03 - test] W/ResourceType( 8160): ResXMLTree_node header size 0 is too small.
b.) [2014-04-15 18:39:03 - test] C:\Users\KC\Desktop\Android-budle\test\res\menu\main.xml:6: error: Error: No resource found that matches the given name (at 'title' with value '#string/action_settings').
I'm not able to understand what am I missing. Please provide me a solution for this issue, Thanks in advance.
Firstly Check your layout xml. I there is any error then correct it.After that press alt+p then select clean after that it will be build again.
In your activity_main.xml>Button you need to put the android:onClick="methodName". The in your main_activity you schould implement methodName. There you can handle the activities once the Button is clicked.
Another way is to implement the onClickListener to sepertate the XML and the Java files.
Can you add your layout XML files?
Write the onClickListener for your button in your MainActivity onCreate() method and inside it redirect to test2 activity as below:
btn = (Button)findViewById(R.id.click);
btn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent intent=new Intent(MainActivity.this,test2.class);
startActivity(intent);
}
});
EDITED:
You need to set your view as fragment_main.xml besides activity_main as your Button is inside fragment_main layout.
Just change the
setContentView(R.layout.activity_main);
to
setContentView(R.layout.fragment_main);
There is something wrong syntax wise with your xml files (test2 or activity_main) due to which the auto generated R file will no longer generate the id for the button view.
The main problem seems to be with activity_main as the button contained in it is no longer converted to its corresponding value in R file.
Check those files and if not able to figure out than put the code in order to get help.
Last but not the least check if you have the import statement like import android.R.
You don't need this to be there as it causes such errors if present.
UPDATE:
You are using -
1) setContentView(R.layout.activity_main);
2) btn = (Button)findViewById(R.id.click);
But your layout where you defined your button is setContentView(R.layout.fragment_main);
So btn is trying to find the view in activity_main which is not available.
Solution -
Set the content view to setContentView(R.layout.fragment_main).
I'm very new to Android Development and I'd like to add a page to another dynamically. I'm a C# web developer and would like to do the same as using a Master Page and inserting other pages in this page.
The code I have at the moment is as follow: (Keep in mind that I've never done this, and any and all advise would be appreciated.)
I Have 3 main documents I'm working on at the moment:
Pharma Manifest.xml
MainActivity.java
fragment_main_dummy.xml(I'm using the dummy since it's already doing what I want.)
Here is the content on MainActivity.xml
package com.pharma.pharma;
import org.w3c.dom.Text;
import android.annotation.TargetApi;
import android.app.ActionBar;
import android.location.Address;
import android.os.Bundle;
import android.content.Context;
import android.os.Build;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.NavUtils;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;
public class MainActivity extends FragmentActivity implements
ActionBar.OnNavigationListener {
/**
* The serialization (saved instance state) Bundle key representing the
* current dropdown position.
*/
private static final String STATE_SELECTED_NAVIGATION_ITEM = "selected_navigation_item";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Set up the action bar to show a dropdown list.
final ActionBar actionBar = getActionBar();
actionBar.setDisplayShowTitleEnabled(false);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);
// Set up the dropdown list navigation in the action bar.
actionBar.setListNavigationCallbacks(
// Specify a SpinnerAdapter to populate the dropdown list.
new ArrayAdapter<String>(getActionBarThemedContextCompat(),
android.R.layout.simple_list_item_1,
android.R.id.text1, new String[] {
getString(R.string.title_Dashboard),
getString(R.string.title_Customers),
getString(R.string.title_Products),
getString(R.string.title_Detailing),
getString(R.string.title_Appointments),
getString(R.string.title_Events), }), this);
}
/**
* Backward-compatible version of {#link ActionBar#getThemedContext()} that
* simply returns the {#link android.app.Activity} if
* <code>getThemedContext</code> is unavailable.
*/
#TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
private Context getActionBarThemedContextCompat() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
return getActionBar().getThemedContext();
} else {
return this;
}
}
#Override
public void onRestoreInstanceState(Bundle savedInstanceState) {
// Restore the previously serialized current dropdown position.
if (savedInstanceState.containsKey(STATE_SELECTED_NAVIGATION_ITEM)) {
getActionBar().setSelectedNavigationItem(
savedInstanceState.getInt(STATE_SELECTED_NAVIGATION_ITEM));
}
}
#Override
public void onSaveInstanceState(Bundle outState) {
// Serialize the current dropdown position.
outState.putInt(STATE_SELECTED_NAVIGATION_ITEM, getActionBar()
.getSelectedNavigationIndex());
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onNavigationItemSelected(int position, long id) {
// When the given dropdown item is selected, show its contents in the
// container view.
Fragment fragment = new DummySectionFragment();
Bundle args = new Bundle();
args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position + 1);
fragment.setArguments(args);
getSupportFragmentManager().beginTransaction()
.replace(R.id.container, fragment).commit();
return true;
}
/**
* A dummy fragment representing a section of the app, but that simply
* displays dummy text.
*/
public static class DummySectionFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
public static final String ARG_SECTION_NUMBER = "section_number";
public DummySectionFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main_dummy, container, false);
TextView dummyTextView = (TextView) rootView.findViewById(R.id.section_label);
dummyTextView.setText(Integer.toString(getArguments().getInt(ARG_SECTION_NUMBER)));
switch(getArguments().getInt(ARG_SECTION_NUMBER)){
case 1:
dummyTextView.setText("blah Blah Dashboard");
break;
case 2:
dummyTextView.setText("blah Blah Customers");
break;
case 3:
dummyTextView.setText("blah Blah Products");
break;
case 4:
dummyTextView.setText("blah Blah Detailing");
break;
case 5:
dummyTextView.setText("blah Blah Appointments");
break;
case 6:
//Insert XML to fragment dummy here as a test
break;
default:
//throw error
}
return rootView;
}
}
}
Here is the code in the Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.pharma.pharma"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="11"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.pharma.pharma.MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
And lastly the code for fragment_main_dummy.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".MainActivity$DummySectionFragment" >
<TextView
android:id="#+id/section_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textIsSelectable="true" />
<include
android:id="#+id/section_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
layout="#layout/dashboard" />
</RelativeLayout>
I've sat with this for days.
I'm still new at this and can't figure it out. I'm also pressured to get this whole project done in about a months time. Any help would be greatly appreciated.
Your title is conceptually wrong, you don't one XML to another. Those XML are heavily crunched and pre-compiled during the compile time and don't exist as you see them in the final app.
Further, those XML are just representations for the system to build Views and inside ViewGroups which is a class that extends View you can call .addView(view);
The include xml code you use, is a good way to re-use static generated XML, but for dynamic generated stuff you need to do it via code.
I've notice you're using fragments stuff. So probably you're better use the Fragment route of dynamically adding/removing stuff
The code you created inside onNavigationItemSelected is pretty much everything you need to do to dynamically change stuff around.
The fragment you're creating/instantiating will override onCreateView to inflate a new View and return it. That new view will be inserted on android.R.id.content (that is the View ID for your whole content) or for any ID that you specified in your XML.
hope it helps.
You could use LayoutInflater to do that.
eg.
RelativeLayout relativeLayout= (RelativeLayout) findViewById(R.id.relativeLayout);
LayoutInflater layoutInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
relativeLayout.addView(childIndex, layoutInflater.inflate(R.layout.newLayoutToAdd, this, false) );