I'm very new in android and i am working on a app.
I meet problem in linking the 2nd page to the 3rd page while clicking the button. I had tried to solve the problem but it do not work. Below is my AndroidManifest.xml
`
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.fyp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="#string/title_activity_main" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".BelajarActivity"
android:label="#string/title_activity_main">
</activity>
<activity
android:name=".KnamaActivity"
android:label="#string/title_activity_main">
</activity>
</application>
</manifest>
below is BelajarActivity.java
package com.example.fyp;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class BelajarActivity extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.belajar);
Button bnama = (Button) findViewById(R.id.knama);
bnama.setOnClickListener(new Button.OnClickListener() {
#Override
public void onClick(View v) {
Intent namaIntent = new Intent(BelajarActivity.this,KnamaActivity.class);
startActivity(namaIntent);
}
});
}
}
This
bnama.setOnClickListener(new Button.OnClickListener() { //this is wrong
...
});
should be
bnama.setOnClickListener(new View.OnClickListener() {
..
});
OnClickListener should be of type View
Just change this line
bnama.setOnClickListener(new View.OnClickListener() {
Related
When I try to run the code I keep getting this error "The activity must be exported or contain an intent-filter".
I have set the small drop down beside the green run button to "app" and I have also put an intent-filter in my activity in the manifest. But this doesn't help. Hopefully someone can help me.
The code below is of my manifest file.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.brian.project">
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity
android:name=".MainActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".LoginSignupActivity.LoginActivity"
android:configChanges="orientation"
android:screenOrientation="portrait">
</activity>
<activity android:name=".HomeActivity"></activity>
<activity android:name=".LoginSignupActivity.SignupActivity"></activity>
<!--<activity android:name="WeightActivity"></activity>-->
</application>
</manifest>
My MainActivity code:
package com.example.brian.project;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import com.example.brian.project.LoginSignupActivity.LoginActivity;
import com.example.brian.project.LoginSignupActivity.SignupActivity;
public class MainActivity extends AppCompatActivity {
Button Login, Create_Account;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button Login=(Button) findViewById(R.id.btn_login);
Button Create_Account=(Button) findViewById(R.id.btn_create_account);
Login.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v){
openLoginActivity();
}
});
Create_Account.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v){
openSignupActivity();
}
});
}
public void openLoginActivity() {
Intent intent = new Intent(MainActivity.this, LoginActivity.class);
startActivity(intent);
}
public void openSignupActivity() {
Intent intent = new Intent(MainActivity.this, SignupActivity.class);
startActivity(intent);
}
}
Try to use android:exported="true" in the <activity> tag:
<activity
android:name=".MainActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
When inspecting my code, I get an error in the AndroindManifest.xml saying that
".MainActivity" in <activity android:name=".MainActivity"> is not a concrete class.
The App is, therefore, crashing in the Emulator of Android Studio.
Here is the Java Code of the Application:
package de.thi.donotpressthebutton;
import android.media.MediaPlayer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
Button button;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = (Button) findViewById(R.id.button);
final MediaPlayer audio = MediaPlayer.create(this, R.raw.niggaz_audio );
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
audio.start();
}
});
}
}
And here is the XML Code:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="de.thi.donotpressthebutton">
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity"> **//error**
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
If your mainactivity.java is not in the package root directory, you should add the folder name. For example, mainactivity.java in the com.balbala.holleworld/View/folder should be <activity android:name=".view.MainActivity"> instead of <activity android:name=".view.MainActivity">. Hope to solve your problem.
The other Reason For this Type Of Error Might Be That You Have Accidentally Used "Abstract"
Keyword Before the Activity Name That Might Have Caused The Problem In The Project
complete newbie here .. im creating my first android quiz game.
i would like to start another activity if button is clicked. (from mainactivity to quizactivity)
i used intent for this but when i try to run it on device and i click on the button, the game crashes . a little help please
here is my main activity
package com.example.clicktothink;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends Activity{
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btn= (Button)findViewById(R.id.play_btn);
btn.setOnClickListener(new OnClickListener()
{ public void onClick(View v)
{
Intent intent = new Intent(MainActivity.this, QuizActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
startActivity(intent);
}
});
}
}
and here is my manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.clicktothink"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="16"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.clicktothink.QuizActivity"
android:label="#string/app_name"
android:parentActivityName="com.example.clicktothink.MainActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.example.clicktothink.MainActivity" />
</activity>
<activity
android:name="com.example.clicktothink.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>
please check your mainfest and change that to this .
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.clicktothink"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="16"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.clicktothink.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="com.example.clicktothink.QuizActivity"/>
</application>
</manifest>
btn.setOnClickListener(new OnClickListener()
{ public void onClick(View v)
{
Intent intent = new Intent(MainActivity.this, QuizActivity.class);
startActivity(intent);
}
});
instead of this
Intent intent = new Intent(MainActivity.this, QuizActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
startActivity(intent);
change to this
Intent intent = new Intent(MainActivity.this, QuizActivity.class);
startActivity(intent);
I have created 2 activities.When i call second activity from first via intent then onCreate method of second activity does not called.Although first activity's onCreate method is called normally as it should be.
Below is the code for first activity.
package com.webesperto.webespertofirstapp;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends Activity implements OnClickListener {
int counter;
Button add, sub;
TextView tView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
counter = 0;
add = (Button) findViewById(R.id.bAdd);
sub = (Button) findViewById(R.id.bSub);
tView = (TextView) findViewById(R.id.textView1);
// Intent in = new Intent(AC);
add.setOnClickListener(this);
sub.setOnClickListener(this);
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.bAdd:
tView.setText(++counter + "");
try {
Intent nextIntentView = new Intent(MainActivity.this, ShowValueActivity.class);
nextIntentView.putExtra("key", "counter");
startActivity(nextIntentView);
}
catch (Exception e) {
e.printStackTrace();
}
break;
case R.id.bSub:
tView.setText(--counter + "");
break;
default:
break;
}
}
}
Code for second activity.
package com.webesperto.webespertofirstapp;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;
public class ShowValue extends Activity {
TextView tv_showValue1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.show_value);
tv_showValue1 = (TextView) findViewById(R.id.tv_showValue);
Intent gotIntent = (Intent) this.getIntent();
Bundle gotBundle = gotIntent.getExtras();
tv_showValue1.setText(gotBundle.getString("key"));
}
}
Manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.webesperto.webespertofirstapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
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.webesperto.webespertofirstapp.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=".ShowValueActivity"
android:label="#string/title_activity_show_value" >
</activity>
</application>
</manifest>
you have
<activity
android:name=".ShowValueActivity"
android:label="#string/title_activity_show_value" >
</activity>
instead of
<activity
android:name=".ShowValue"
android:label="#string/title_activity_show_value" >
</activity>
Since your code reads
public class ShowValue extends Activity {
Though, why doesnt your application crash saying NoActivityFoundException ??
please have a look on manifest
change
<activity
android:name=".ShowValueActivity"
android:label="#string/title_activity_show_value" >
</activity>
to
<activity
android:name=".ShowValue"
android:label="#string/title_activity_show_value" >
</activity>
yours manifest should be like this
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.webesperto.webespertofirstapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
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.webesperto.webespertofirstapp.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=".ShowValue"
android:label="#string/title_activity_show_value" >
</activity>
</application>
</manifest>
Change your Second Activity name in class file like this:
package com.webesperto.webespertofirstapp;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;
public class ShowValueActivity extends Activity {
TextView tv_showValue1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.show_value);
tv_showValue1 = (TextView) findViewById(R.id.tv_showValue);
Intent gotIntent = (Intent) this.getIntent();
Bundle gotBundle = gotIntent.getExtras();
tv_showValue1.setText(gotBundle.getString("key"));
}
}
It will work:)
I have created this activity with two buttons
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.content.Intent;
public class SelectOption extends Activity{
Button bu1,bu2,bu3;
#Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.option_main);
bu1 = (Button)findViewById(R.id.button1);
bu2 = (Button) findViewById(R.id.button2);
bu1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
Intent myintent1 = new Intent(SelectOption.this, CheckBalance.class);
startActivity(myintent1);
}
});
bu2.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
Intent myintent2 = new Intent(SelectOption.this, CheckAvailability.class);
startActivity(myintent2);
}
});
and there are 2 activities called CheckBalance.java and CheckAvailability.java also. but when I Run the program nothing happen on it. Does anyone have an idea what wrong with this??
Use this code in on click listener
Intent intent = new Intent();
intent.setClass(getApplicationContext(), CheckBalance.class);
startActivity(intent);
and also check weather you activities declare in manifest file and in Xml also....
This is My Manifest file (On behalf of Original question Asker(Anuradha))
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.people.oshada"
android:versionCode="1"
android:versionName="1.0" >
<uses-permission android:name="android.permission.INTERNET" />
<uses-sdk android:minSdkVersion="15" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<activity
android:name=".TheMainActivity"
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=".SelectOption"></activity>
<activity android:name=".CheckBalance"></activity>
<activity android:name=".CheckAvailability"></activity>
</application>
In ANDROID MAINFEST FILE u have to add
<activity android:name=". CheckBalance"/>
<activity android:name=". CheckAvailability"/>