用全屏按钮在下一个活动上播放视频

问题描述：

没有Main2Activity的情况下一切正常，但我想要做的是在单击全屏按钮时播放Main2Activity上的视频。在MainActivity上一切正常，但是当我点击全屏按钮时，它会崩溃。不知道为什么。我是Android开发新手，任何帮助将不胜感激。用全屏按钮在下一个活动上播放视频

MainActivity：

public class MainActivity extends AppCompatActivity { 


    Button buttonPlay; 
    Button buttonFullScreen; 
    static final int REQUEST_VIDEO_CAPTURE = 1; 
    VideoView resultvideo; 
    MediaController mediacontroller; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     this.requestWindowFeature(Window.FEATURE_NO_TITLE); 
     this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
       WindowManager.LayoutParams.FLAG_FULLSCREEN); 
     this.setContentView(R.layout.activity_main); 

     setContentView(R.layout.activity_main); 

     resultvideo = (VideoView)findViewById(R.id.videoView); 
     mediacontroller = new MediaController(MainActivity.this); 

     mediacontroller.setAnchorView(resultvideo); 

     resultvideo.setMediaController(mediacontroller); 

     Button click = (Button)findViewById(R.id.buttonRecord); 
     resultvideo = (VideoView)findViewById(R.id.videoView); 
    } 

    public void dispatchTakeVideoIntent(View v) { 
     Intent takeVideoIntent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE); 
     if (takeVideoIntent.resolveActivity(getPackageManager()) != null) { 
      startActivityForResult(takeVideoIntent, REQUEST_VIDEO_CAPTURE); 
     } 
    } 

    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     if (requestCode == REQUEST_VIDEO_CAPTURE && resultCode == RESULT_OK) { 
      Uri videoUri = data.getData(); 
      Log.i("test","111111111111111" + videoUri.toString()); 
      resultvideo.setVideoURI(videoUri); 
      mediacontroller.setAnchorView(resultvideo); 
      resultvideo.pause(); 

     } 
     buttonPlay = (Button) findViewById(R.id.buttonPlay); 
     { 
      buttonPlay.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        mediacontroller.show(); 
        mediacontroller.setAnchorView(resultvideo); 
        resultvideo.start(); 
        Log.i("test","111111111111111"); 
       } 
      }); 
     } 

     buttonFullScreen = (Button) findViewById(R.id.buttonFullScreen); 
     { 
      buttonFullScreen.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        startActivity(new Intent(MainActivity.this, Main2Activity.class)); 
       } 
      }); 
     } 
    } 
}

Main2Activity：

public class Main2Activity extends MainActivity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     this.requestWindowFeature(Window.FEATURE_NO_TITLE); 
     this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
       WindowManager.LayoutParams.FLAG_FULLSCREEN); 

     setContentView(R.layout.activity_main2); 
    } 

    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data){ 
     if (requestCode == REQUEST_VIDEO_CAPTURE && resultCode == RESULT_OK) { 
      Uri videoUri = data.getData(); 
      Log.i("test", "111111111111111" + videoUri.toString()); 
      resultvideo.setVideoURI(videoUri); 
      mediacontroller.setAnchorView(resultvideo); 
      resultvideo.pause(); 

     } 
     buttonFullScreen = (Button) findViewById(R.id.buttonFullScreen); 
     { 
      buttonFullScreen.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        mediacontroller.show(); 
        mediacontroller.setAnchorView(resultvideo); 
        resultvideo.start(); 
        Log.i("test","111111111111111"); 
       } 
      }); 
     } 
    } 
}

发布您的崩溃日志 – Yupi

发布您的崩溃日志，并且不要将java代码添加为片段！ – Zoe

什么是写在崩溃日志？ – Zoffa

答

resultvideo在MainActivity声明，它不提供Main2Activity

它仍然崩溃。 – Renzo

请在这里发布您的崩溃日志 –

答

mediacontroller和resultvideo在MainActivity声明，他们是在Main2Activity ？您还必须在Main2Activity的布局中安排它们，因为您在MainActivity布局中找到它们，并通过Main2Activity中的ID找到它们也是必需的。

用全屏按钮在下一个活动上播放视频

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