在我的Android应用程序中,当单击图像时,我需要停止运行Runnable
。我使用ImageView.postDelayed()
重复运行此Runnable
:
r = new Runnable() {
public void run() {
imgview.setImageResource(imageArray[i]);
i++;
if (i >= imageArray.length) {
i = 0;
}
imgview.postDelayed(r, 20); // set to go off again in 3 seconds.
// imgview.setOnClickListener(this);
}
};
imgview.postDelayed(r, 20); // set first time for 3 seconds
但在某些条件下,我希望停止它的运行,即在它已经启动后停止。这是我的活动的完整代码:
public class MainActivity extends Activity {
int i = 0;
ImageView imgview, imgview2;
Handler handler = new Handler();
Runnable r;
MediaPlayer mMediaPlayer;
int[] imageArray = { R.drawable.f1, R.drawable.f2, R.drawable.f3,
R.drawable.f4, R.drawable.f5, R.drawable.f6, R.drawable.f7,
R.drawable.f8, R.drawable.f9, R.drawable.f10, R.drawable.f11,
R.drawable.f12, R.drawable.f13, R.drawable.f14, R.drawable.f15,
R.drawable.f16, R.drawable.f17, R.drawable.f18, R.drawable.f19,
R.drawable.f20, R.drawable.f21, R.drawable.f22, R.drawable.f23,
R.drawable.f24, R.drawable.f25, R.drawable.f26, R.drawable.f27,
R.drawable.f28 };
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.tapp_activity);
imgview = (ImageView) findViewById(R.id.imageView1);
mMediaPlayer = new MediaPlayer();
mMediaPlayer = MediaPlayer.create(MainActivity.this, R.raw.water);
mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
imgview2 = (ImageView) findViewById(R.id.imageView2);
imgview2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(i==0)
{
mMediaPlayer.setLooping(true);
mMediaPlayer.start();
i=1;
r = new Runnable() {
public void run() {
imgview.setImageResource(imageArray[i]);
i++;
if (i >= imageArray.length) {
i = 0;
}
imgview.postDelayed(r, 20); // set to go off again in 3 seconds.
// imgview.setOnClickListener(this);
}
};
imgview.postDelayed(r, 20); // set first time for 3 seconds
}
else
{
i=0;
mMediaPlayer.stop();
imgview.setBackgroundResource(R.drawable.tapstill);
}
}
});
}
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
mMediaPlayer.stop();
}
}
我怎样修改代码,使得我的Runnable
在onClick()
方法的else
条件中停止运行?