Develop Reference

my app is not running still in my phone but is not showing any error

It Shows no error on Android Studio but app even not starting on phone.Is there any problem with the code.I feel like there may be any mistakes in syntax but i am not able to find one.Please help me.
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
private Button bDriver,bCustomer;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button bDriver=(Button)findViewById(R.id.driver);
Button bCustomer=(Button)findViewById(R.id.customer);
bDriver.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent=new
Intent(MainActivity.this,DriverLoginActivity.class);
startActivity(intent);
finish();
}
});
bCustomer.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent ryt=new
Intent(MainActivity.this,CustomerLoginActivity.class);
startActivity(ryt);
finish();
}
});
}
}
And activity_main.xml is this and please explain if there is any problem related to SDK version also upload the detail.
<?xml version="1.0" encoding="utf-8"?>
<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.trillcore.uber.MainActivity">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/driver"
android:layout_below="#+id/customer"
android:text="I am a Driver"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="I am a Customer"
android:layout_above="#+id/driver"
android:id="#+id/customer"/>
</RelativeLayout>

EditText change setError text position

So so what im trying to implement has two parts
One im giving my edittext the passwordToggle for which im using
android.support.design.widget TextInputLayout+TextInputEditText
So this is how my edittext looks like
Part two is i want to add validation and set appropriate error message.
I need the error message to be shown as follows
My layout code is as follows
<android.support.design.widget.TextInputLayout
    style="#style/editTextBold"
    android:id="#+id/input_pwd_parent"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:hintAnimationEnabled="false"
    app:hintEnabled="false"
    app:passwordToggleEnabled="true">
    <android.support.design.widget.TextInputEditText
        android:id="#+id/input_pwd"
        style="#style/editTextBold"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#android:color/transparent"
        android:ems="10"
        android:hint="#string/hint_pwd"
        android:inputType="textPassword"
        android:padding="10dp" />
</android.support.design.widget.TextInputLayout>
So what i want to know is
1.How do i hide/unhide the password toggle icon in the edittext via code?
2.Also how do i make the setError message appear in place of the passwordToggle icon(once i hide it via code)

Ended up creating a custom view
The component can be found here
https://github.com/vnh1991/CustomValidatorEditText
Import the lib project as a module ,
in your layout create a container
<?xml version="1.0" encoding="utf-8"?>
<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"
tools:context="com.v2dev.customedittextdemo.MainActivity">
<LinearLayout
android:id="#+id/llContainer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:orientation="vertical"></LinearLayout>
<Button
android:id="#+id/btnValidate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_below="#+id/llContainer"
android:padding="10dp"
android:text="Validate" />
</RelativeLayout>
And in your activity load the component into the container
package com.v2dev.customedittextdemo;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.Toast;
import com.v_sQr_dev.customvalidatoredittext.CustomEdittext;
public class MainActivity extends AppCompatActivity {
private LinearLayout llContainer;
private Button btnValidate;
private CustomEdittext inputPwd;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
llContainer = (LinearLayout) findViewById(R.id.llContainer);
btnValidate = (Button) findViewById(R.id.btnValidate);
inputPwd = new CustomEdittext(llContainer, this);
inputPwd.setHint("PASSWORD");
btnValidate.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if(inputPwd.validate()){
Toast.makeText(MainActivity.this,"Input Valid",Toast.LENGTH_SHORT).show();
}
}
});
}
}

Android can't find my OnClick method

I have an issue with this botton, when is clicked the app send a message "ImageButton has stopped". I think it's something dumb, but I just started coding. Details of my code are below.
LogCat:
12-13 21:01:56.659 1075-1075/com.example.christian.imagebutton E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.christian.imagebutton, PID: 1075
java.lang.IllegalStateException: Could not find method llamar(MainActivity)(View) in a parent or ancestor Context for android:onClick attribute defined on view class android.support.v7.widget.AppCompatImageButton with id 'boton1'
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.resolveMethod(AppCompatViewInflater.java:327)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:284)
at android.view.View.performClick(View.java:5637)
at android.view.View$PerformClick.run(View.java:22429)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Main Activity
package com.example.christian.imagebutton;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
private TextView tv1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv1=(TextView)findViewById(R.id.tv1);
}
public void llamar(View view){
tv1.setText("Llamando");
}
}
And the layout is:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/activity_main"
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.christian.imagebutton.MainActivity">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:srcCompat="#mipmap/telefono"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:id="#+id/boton1"
android:onClick="llamar(MainActivity)" />
<TextView
android:text="TextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/boton1"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="22dp"
android:id="#+id/tv1" />
</RelativeLayout>

android:onClick="llamar"
Shouldn't it be like this?

Android just implements the OnClickListener for you when you define the android:onClick="someMethod" attribute.
Those two code snippets are totally the same but just implemented in two different ways.
Code Implementation
Button btn = (Button) findViewById(R.id.mybutton);
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
llamar(v);
}
});
// some more code
public void llamar(View v) {
// does something very interesting
}
Above is a code implementation of an OnClickListener. And now the XML implementation.
XML Implementation
<?xml version="1.0" encoding="utf-8"?>
<!-- layout elements -->
<Button android:id="#+id/mybutton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Click me!"
android:onClick="llamar" />
<!-- even more layout elements -->
Now in the background Android does nothing else than the Java code calling your method on a click event.
Note that with the XML above, Android will look for the onClick method llamar() only in the current Activity. This is important to remember if you are using fragments, since even if you add the XML above using a fragment, Android will not look for the onClick method in the .java file of the fragment used to add the XML.

string aren't passing between my activities maybe xml issue in android studio

Please help me figure out why my string isn't passing between my activities in android studio. I ran this script on my phone but the string I'm passing from my main activity is passing to my secondary activity. I'm going through an android teach yourself book and I believe the issue is in my XML.
Here's my XML code:
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<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.owner.hour3application.MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!" />
</RelativeLayout>
activity_secondary.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="com.example.owner.hour2application.SecondaryActivity">
<TextView
android:id="#+id/message"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:textAppearance="?android:attr/textAppearanceLarge" />
</android.support.design.widget.CoordinatorLayout>
Main Activity
package com.example.owner.hour2application;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button activityButton = (Button) findViewById(R.id.Button);
if (activityButton != null) {
activityButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent startIntent = new Intent(MainActivity.this, SecondaryActivity.class);
startIntent.putExtra("com.example.owner.MESSAGE", "Hello SecondaryActivity");
startActivity(startIntent);
}
});
}
}
}
Secondary Activity
package com.example.owner.hour2application;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.TextView;
public class SecondaryActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_secondary);
Intent intent = getIntent();
String message = intent.getStringExtra("com.example.owner.MESSAGE");
TextView messageTextView = (TextView) findViewById(R.id.message);
if (messageTextView != null) {
messageTextView.setText(message);
}
}
}

Thanks guys sorry I posted the wrong main activity. The issue was in string.xml the string name was wrong. Thanks!

Context Menu/Window in WebView inside PopupWindow crashes the app?

I have an app with PopupWindow containing WebView that opens Facebook's page, any context menu like: the Autocomplete on text fields in the WebView or even the Long Press that should display options for the user to copy/paste/cut crashes the app right away with the follow error:
FATAL EXCEPTION: main
android.view.WindowManager$BadTokenException: Unable to add window -- token android.view.ViewRootImpl$W#418cdab0 is not valid; is your activity running?
at android.view.ViewRootImpl.setView(ViewRootImpl.java:700)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:345)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:224)
at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:149)
at android.view.Window$LocalWindowManager.addView(Window.java:554)
at android.widget.PopupWindow.invokePopup(PopupWindow.java:1013)
at android.widget.PopupWindow.showAtLocation(PopupWindow.java:856)
at android.widget.PopupWindow.showAtLocation(PopupWindow.java:820)
at android.webkit.WebViewClassic$PastePopupWindow.show(WebViewClassic.java:971)
at android.webkit.WebViewClassic.showPasteWindow(WebViewClassic.java:7037)
at android.webkit.WebViewClassic.access$10300(WebViewClassic.java:235)
at android.webkit.WebViewClassic$PrivateHandler.handleMessage(WebViewClassic.java:11376)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4921)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)
at dalvik.system.NativeStart.main(Native Method)
Notice: my understanding of the problem is that the context menu/window are shown actually in the scope of the app itself not inside the WebView using another PopWindow (Auto generated by the Core WebView Class) this class references the context incorrectly.
My Code is as follows:
Main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<Button
android:id="#+id/openpopup"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Open Popup Window" />
</LinearLayout>
Popup.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#android:color/background_light"
android:orientation="vertical" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_margin="1dp"
android:background="#android:color/darker_gray"
android:orientation="vertical" >
>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_margin="20dp"
android:orientation="vertical" >
<WebView
xmlns:ptr="http://schemas.android.com/apk/res-auto"
android:id="#+id/webviewActionView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:minHeight="200dp"
android:minWidth="200dp"
android:scrollbars="none" >
</WebView>
<Button
android:id="#+id/dismiss"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Dismiss" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
MainActivity.java
import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.PopupWindow;
public class MainActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final Button btnOpenPopup = (Button) findViewById(R.id.openpopup);
btnOpenPopup.setOnClickListener(new Button.OnClickListener() {
#SuppressLint("NewApi")
#Override
public void onClick(View arg0) {
LayoutInflater layoutInflater = (LayoutInflater) getBaseContext().getSystemService(LAYOUT_INFLATER_SERVICE);
View popupView = layoutInflater.inflate(R.layout.popup, null);
final PopupWindow popupWindow = new PopupWindow(popupView,
LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
popupWindow.setTouchable(true);
popupWindow.setFocusable(true);
WebView popupWebview = (WebView) popupView.findViewById(R.id.webviewActionView);
popupWebview.loadUrl("https://m.facebook.com");
Button btnDismiss = (Button) popupView
.findViewById(R.id.dismiss);
btnDismiss.setOnClickListener(new Button.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
popupWindow.dismiss();
}
});
popupWindow.showAsDropDown(btnOpenPopup, 50, -30);
}
});
}
}

As commented above in my answer you can use Custom dialog for your requirement.. i have created a sample PopupDialog.. please check and let me know..if it solve your purpose.. Autocomplete and ContextMenus will work as expected..
MyActivity.java
package com.example.testapp;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
public class MyActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final Button btnOpenPopup = (Button) findViewById(R.id.openpopup);
btnOpenPopup.setOnClickListener(new Button.OnClickListener() {
#SuppressLint("NewApi")
#Override
public void onClick(View arg0) {
final PopupDialog popupDialog = new PopupDialog(MyActivity.this);
popupDialog.setContentView(R.layout.popup);
WebView popupWebview = (WebView) popupDialog.findViewById(R.id.webviewActionView);
popupWebview.setWebChromeClient(new WebChromeClient());
popupWebview.setWebViewClient(new WebViewClient());
popupWebview.loadUrl("http://m.facebook.com");
Button btnDismiss = (Button) popupDialog
.findViewById(R.id.dismiss);
btnDismiss.setOnClickListener(new Button.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
popupDialog.dismiss();
}
});
// popupDialog.showAtLocation(50,50);
popupDialog.showAsDropDown(findViewById(R.id.openpopup));
}
});
}
}
PopupDialog.java
package com.example.testapp;
import android.app.Dialog;
import android.content.Context;
import android.view.Gravity;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
public class PopupDialog extends Dialog{
private final Context mContext;
public PopupDialog(Context context) {
super(context);
mContext=context;
requestWindowFeature(Window.FEATURE_NO_TITLE);
}
public void showAtLocation(int x,int y)
{
WindowManager.LayoutParams wmlp = getWindow().getAttributes();
wmlp.gravity = Gravity.TOP | Gravity.LEFT;
wmlp.x = x;
wmlp.y = y;
show();
}
public void showAsDropDown(View view)
{
float density = mContext.getResources().getDisplayMetrics().density;
WindowManager.LayoutParams wmlp = getWindow().getAttributes();
int[] location = new int[2];
view.getLocationInWindow(location);
wmlp.gravity = Gravity.TOP | Gravity.LEFT;
wmlp.x = location[0]+(int)(view.getWidth()/density);
wmlp.y = location[1]+(int)(view.getHeight()/density);
show();
}
}
edit: added popup.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:minHeight="400dp"
android:minWidth="200dp"
android:background="#android:color/background_light"
android:orientation="vertical" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_margin="1dp"
android:background="#android:color/darker_gray"
android:orientation="vertical" >
>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_margin="20dp"
android:orientation="vertical" >
<WebView
xmlns:ptr="http://schemas.android.com/apk/res-auto"
android:id="#+id/webviewActionView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:minHeight="200dp"
android:minWidth="200dp"
android:scrollbars="none" >
</WebView>
<Button
android:id="#+id/dismiss"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Dismiss" />
</LinearLayout>
</LinearLayout>

yes i think you should use your activity name in place of "getBaseContext()". i am just created one demo with your code. its working fine in my pc. and when you are getting this exception?

Nothing wrong in your code..seems to be Android 4.1+ specific issue..
Webview is also using PopupWindow for showing Paste context menu in input box..Nested popupwindows through webview is causing WindowManager crash, while adding new view to it.
I have tried Custom Dialog(in place of Popupwindow) with embedded Webview, Paste context menu is coming fine in Android 4.1+..
If you are not so specific about this paste context menu you can disable it for particular android version using below code..i have tried it.. it will stop app from being crash..
popupWebView.setOnLongClickListener(new OnLongClickListener() {
#Override
public boolean onLongClick(View v) {
if (Build.VERSION.SDK_INT >= 16)
return true;
return false;
}
});
Also you can look at Webview HitTestResult class for displaying some custom made Context menus, according to your needs..