强力关闭RingtonePicker

Question

我的代码拒绝返回正确的requestCode，所以我即兴创作了一下。它总是返回-1。

if(v.getId() == R.id.imageButton9) 
    { 
     request = 888; 
     Intent wpIntent = new Intent(); 
     wpIntent.setType("image/*"); 
     wpIntent.setAction(Intent.ACTION_GET_CONTENT); 
     startActivityForResult(Intent.createChooser(wpIntent, "Select Picture"), SELECT_PICTURE); 
    } 

    else if(v.getId() == R.id.imageButton10) 
    { 
     String uri = null; 
     request = 999; 
     rtIntent = new Intent(RingtoneManager.ACTION_RINGTONE_PICKER); 
     rtIntent.putExtra(RingtoneManager.EXTRA_RINGTONE_TYPE, RingtoneManager.TYPE_RINGTONE); 
     rtIntent.putExtra(RingtoneManager.EXTRA_RINGTONE_TITLE, "Select Tone"); 
     if(uri != null) 
     { 
      rtIntent.putExtra(RingtoneManager.EXTRA_RINGTONE_EXISTING_URI, Uri.parse(uri)); 
     } 
     else 
     { 
      rtIntent.putExtra(RingtoneManager.EXTRA_RINGTONE_EXISTING_URI, (Uri)null); 
     }  
     this.startActivityForResult(rtIntent, SELECT_TONE); 
    } 

我已经声明，在我的代码的开头两个变量：

protected static final int SELECT_PICTURE = 888; 
protected static final int SELECT_TONE = 999; 

下面是onActivityResult：

public void onActivityResult(int resultCode, int requestCode, Intent data) 
{ 
    Toast.makeText(this, "onActivityResult: "+requestCode, Toast.LENGTH_SHORT).show(); 

    if(request == 888) 
    { 
     Toast.makeText(this, "Picture Selection", Toast.LENGTH_SHORT).show(); 
     Uri selectedImage = Uri.parse(data.getDataString()); 
     wpPath = getPath(selectedImage); 
     Toast.makeText(this, "WP Path: "+wpPath, Toast.LENGTH_SHORT).show(); 
     request = 0; 
    } 

    else if(request == 999) 
    { 
     Toast.makeText(this, "Tone Selection", Toast.LENGTH_SHORT).show(); 
     Log.i("RT Picked is: ", rtIntent.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI).toString()); 
     Uri uri = rtIntent.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI); 
     if (uri != null) 
     { 
      rtPath = uri.toString(); 
      Toast.makeText(this, "Ringtone Path: "+rtPath, Toast.LENGTH_SHORT).show(); 
      request = 0; 
     } 
    } 
} 

这总是强制关闭。它给出以下错误：

06-01 12:40:35.388: E/AndroidRuntime(7437): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=999, result=-1, data=Intent { (has extras) }} to activity {com.asim.autobot/com.asim.autobot.profile}: java.lang.NullPointerException

我被卡住了。无法解决这个问题。

首先，为什么requestCode总是返回-1？ 其次，为什么应用程序强制关闭rtIntent.getParcelableExtra（RingtoneManager.EXTRA_RINGTONE_PICKED_URI）;？

编辑： 完整的logcat http://i47.tinypic.com/1zm2gww.jpg

它指向的直线是Log.i（ “RT拣是：”，rtIntent.getParcelableExtra（RingtoneManager.EXTRA_RINGTONE_PICKED_URI）的ToString（））;

Answer 1

当你的-1一个resultCode为则曾任RESULT_OK = -1

检查以下行：

rtIntent.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI).toString() 

你有一个参数叫做Intent data和你应该使用该变量而不是rtIntent变量。你的rtIntent变量不会被修改，所以getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI)可能会返回null。

Answer 2

试试这个代码，

public void onClick(View v) { 

     switch (v.getId()) { 
     case R.id.imageButton9: 
      request = 888; 
      Intent wpIntent = new Intent(); 
      wpIntent.setType("image/*"); 
      wpIntent.setAction(Intent.ACTION_GET_CONTENT); 
      startActivityForResult(Intent.createChooser(wpIntent, "Select Picture"), SELECT_PICTURE); 
     case R.id.imageButton10: 

      String uri = null; 
      request = 999; 
      rtIntent = new Intent(RingtoneManager.ACTION_RINGTONE_PICKER); 
      rtIntent.putExtra(RingtoneManager.EXTRA_RINGTONE_TYPE, RingtoneManager.TYPE_RINGTONE); 
      rtIntent.putExtra(RingtoneManager.EXTRA_RINGTONE_TITLE, "Select Tone"); 
      if(uri != null) 
       { 
        rtIntent.putExtra(RingtoneManager.EXTRA_RINGTONE_EXISTING_URI, Uri.parse(uri)); 
       } 
      else 
       { 
        rtIntent.putExtra(RingtoneManager.EXTRA_RINGTONE_EXISTING_URI, (Uri)null); 
       }  
         this.startActivityForResult(rtIntent, SELECT_TONE); 

      break; 
     default: 
      break; 
     } 

    } 


     public void onActivityResult(int resultCode, int requestCode, Intent data) 
{ 
    Toast.makeText(this, "onActivityResult: "+requestCode, Toast.LENGTH_SHORT).show(); 

    if(requestCode == SELECT_PICTURE) 
    { 
     Toast.makeText(this, "Picture Selection", Toast.LENGTH_SHORT).show(); 
     Uri selectedImage = Uri.parse(data.getDataString()); 
     wpPath = getPath(selectedImage); 
     Toast.makeText(this, "WP Path: "+wpPath, Toast.LENGTH_SHORT).show(); 
     request = 0; 
    } 

    else if(requestCode == SELECT_TONE) 
    { 
     Toast.makeText(this, "Tone Selection", Toast.LENGTH_SHORT).show(); 
     Log.i("RT Picked is: ", rtIntent.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI).toString()); 
     Uri uri = rtIntent.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI); 
     if (uri != null) 
     { 
      rtPath = uri.toString(); 
      Toast.makeText(this, "Ringtone Path: "+rtPath, Toast.LENGTH_SHORT).show(); 
      request = 0; 
     } 
    } 
}