Android - Hinzufügen von Text zu einem Menüelement?

Question

Ich entwickle eine Android App, ich habe ein Element im Menü 'Über' erstellt. Ich möchte, dass Text wie Entwickler-Name, Kontakt, App-Version, wenn ich darauf klicke, auf einer separaten Seite oder Aktivität angezeigt wird. Ich weiß nicht, wie ich das machen soll, ich benutze eine Toast-Nachricht, um diese Details zu zeigen. Bitte Hilfe!

activity_main.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" 
    tools:context=".MainActivity" > 

    <ImageButton 
     android:id="@+id/btnSwitch" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_centerHorizontal="true" 
     android:layout_marginTop="100dip" 
     android:src="@drawable/btn_switch_on" 
     android:background="@null" 
     android:contentDescription="@null" 
     /> 

    <TextView 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:layout_below="@+id/text1" 
     android:layout_marginTop="10dp" 
     android:paddingLeft="10dp" 
     android:lines="2" 
     android:id="@+id/text2" 
     android:clickable="true" 
     android:text="wTorch v1.0" 
     android:fontFamily="Droid Sans" 
     android:autoLink="all" 
     android:typeface="serif" 
     android:textSize="20sp" 
     android:gravity="right" 
     android:textAlignment="gravity" /> 

</RelativeLayout> 

MainActivity.java

package com.wtech.wtorch; 

import android.app.Activity; 
import android.app.AlertDialog; 
import android.content.DialogInterface; 
import android.content.pm.PackageManager; 
import android.hardware.Camera; 
import android.hardware.Camera.Parameters; 
import android.media.MediaPlayer; 
import android.media.MediaPlayer.OnCompletionListener; 
import android.os.Bundle; 
import android.os.Handler; 
import android.util.Log; 
import android.view.View; 
import android.widget.ImageButton; 
import android.widget.Toast; 
import android.view.Menu; 
import android.view.MenuItem; 


    public class MainActivity extends Activity { 

    private static final Parameters para = null; 

    private static Camera cam = null; 

    private static boolean doubleBackToExitPressedOnce = false; 

    ImageButton btnSwitch; 

    private Camera camera; 
    private boolean isFlashOn; 
    private boolean hasFlash; 
    Parameters params; 
    MediaPlayer mp; 


    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     getMenuInflater().inflate(R.menu.menu_main, menu); 
     return true; 
    } 
    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     switch (item.getItemId()) { 
      case R.id.about: 
       Toast.makeText(getApplicationContext()," App Version - 1.0 \n Developer - Mohammad Waris Ansari \n Contact - mohdwaris723@gmail.com",Toast.LENGTH_LONG).show(); 
      return true; 
      default: 
       return super.onOptionsItemSelected(item); 
     } 
    } 


    @Override 
    public void onBackPressed() { 
     if (doubleBackToExitPressedOnce) { 
      super.onBackPressed(); 
      return; 
     } 

     this.doubleBackToExitPressedOnce = true; 
     Toast.makeText(this, "Press again to exit", Toast.LENGTH_SHORT).show(); 

     new Handler().postDelayed(new Runnable() { 

      @Override 
      public void run() { 
       doubleBackToExitPressedOnce=false;      
      } 
     }, 2000); 
    } 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     btnSwitch = (ImageButton) findViewById(R.id.btnSwitch);  
     hasFlash = getApplicationContext().getPackageManager() 
       .hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH); 

     if (!hasFlash) { 
      AlertDialog alert = new AlertDialog.Builder(MainActivity.this) 
        .create(); 
      alert.setTitle("Error"); 
      alert.setMessage("Sorry, your device doesn't support flash light!"); 
      alert.setButton("OK", new DialogInterface.OnClickListener() { 
       public void onClick(DialogInterface dialog, int which) { 
        // closing the application 
        finish(); 
       } 
      }); 
      alert.show(); 
      return; 
     } 

     // get the camera 
     getCamera(); 

     // displaying button image 
     toggleButtonImage(); 


     // Switch button click event to toggle flash on/off 
     btnSwitch.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       if (isFlashOn) { 
        // turn off flash 
        turnOffFlash(); 
       } else { 
        // turn on flash 
        turnOnFlash(); 
       } 
      } 
     }); 
    } 


    // Get the camera 
    private void getCamera() { 
     if (camera == null) { 
      try { 
       camera = Camera.open(); 
       params = camera.getParameters(); 
      } catch (RuntimeException e) { 
       Log.e("Camera Error. Failed to Open. Error: ", e.getMessage()); 
      } 
     } 
    } 
// Turning On flash 
    private void turnOnFlash() { 
     if (!isFlashOn) { 
      if (camera == null || params == null) { 
       return; 
      } 
      params = camera.getParameters(); 
      params.setFlashMode(Parameters.FLASH_MODE_TORCH); 
      camera.setParameters(params); 
      camera.startPreview(); 
      isFlashOn = true; 

      // changing button/switch image 
      toggleButtonImage(); 
     } 

    } 


    // Turning Off flash 
    private void turnOffFlash() { 
     if (isFlashOn) { 
      if (camera == null || params == null) { 
       return; 
      } 
      params = camera.getParameters(); 
      params.setFlashMode(Parameters.FLASH_MODE_OFF); 
      camera.setParameters(params); 
      camera.stopPreview(); 
      isFlashOn = false; 

      // changing button/switch image 
      toggleButtonImage(); 
     } 
    } 

    /* 
    * Toggle switch button images 
    * changing image states to on/off 
    * */ 
    private void toggleButtonImage(){ 
     if(isFlashOn){ 
      btnSwitch.setImageResource(R.drawable.btn_switch_on); 
     }else{ 
      btnSwitch.setImageResource(R.drawable.btn_switch_off); 
     } 
    } 

    @Override 
    protected void onDestroy() { 
     super.onDestroy(); 
    } 

    @Override 
    protected void onPause() { 
     super.onPause(); 
     turnOffFlash(); 
    } 

    @Override 
    protected void onRestart() { 
     super.onRestart(); 
    } 

    @Override 
    protected void onResume() { 
     super.onResume(); 
     if(hasFlash) 
      turnOnFlash(); 
    } 

    @Override 
    protected void onStart() { 
     super.onStart(); 
     getCamera(); 
    } 

    @Override 
    protected void onStop() { 
     super.onStop(); 
     if (camera != null) { 
      camera.release(); 
      camera = null; 
     } 
    } 

} 

menu_main.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android" > 
<item 
android:id="@+id/about" 
android:title="About" 
android:icon="@drawable/ic_menu_info_details"/> 
</menu> 

Answer 1

Sie benötigen einen benutzerdefinierten Dialog Alarm angezeigt werden soll.

dialog.xml

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" > 

<TextView 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:textColor="#FFF" 
    android:text="App Version - 1.0"/> 

<TextView 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:textColor="#FFF" 
    android:text="Developer - Mohammad Waris Ansari"/> 

<Button 
    android:id="@+id/declineButton" 
    android:layout_width="100px" 
    android:layout_height="wrap_content" 
    android:text=" OK " 
    android:layout_marginTop="5dp" 
    android:layout_marginRight="5dp" 
    /> 

</RelativeLayout> 

Und in Ihrem onOptionsItemSelected,

@Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
    switch (item.getItemId()) { 
     case R.id.about: 

    // Create custom dialog object 
      final Dialog dialog = new Dialog(MainActivity.this); 
      // Include dialog.xml file 
      dialog.setContentView(R.layout.dialog); 
      // Set dialog title 
      dialog.setTitle("About"); 

      dialog.show(); 

      Button declineButton = (Button) dialog.findViewById(R.id.declineButton); 
      // if decline button is clicked, close the custom dialog 
      declineButton.setOnClickListener(new OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        // Close dialog 
        dialog.dismiss(); 
       } 
      }); 

      return true; 
      default: 
       return super.onOptionsItemSelected(item); 
     } 
    } 

Answer 2

eine zweite Aktivität erstellen und in onOptionsItemSelected

dorthin navigieren

Answer 3

Sie können neue Aktivität öffnen, wenn Sie auf die Schaltfläche klicken. Aktualisieren Sie Ihre onOptionsItemSelected(MenuItem item) wie folgt aus:

@Override 
      public boolean onOptionsItemSelected(MenuItem item) { 
       switch (item.getItemId()) { 
        case R.id.about: 
         Intent intent = new Intent(MainActivity.this,NewActivity.class); // code to start new activity instead of showing toast 
         intent.putExtra("version","1.0");      
         startActivity(intent); 
        return true; 
        default: 
         return super.onOptionsItemSelected(item); 
       } 
      } 

Sie Daten wie App-Version senden, Entwickler und Kontakt von einer Aktivität zur anderen mit intent.putExtre() und zeigen diese Daten, um neue Aktivitäten.

Im NewActivity können Sie die Daten bekommen, die von der alten Tätigkeit wie das kommt:

Intent intent = getIntent(); 
    String version= intent.getStringExtra("version");