嗨，我正在尝试使用由视频文件制作的背景来实现 Activity。下面发布的解决方案适用于大多数设备，除了 nexus 6 Android 5.1。视频正常工作，已缩放但未裁剪，因此不保留纵横比。
使用 Galaxy Note、HTC One m7、Xperia Z3、Nexus 5 进行测试。
这是代码：
public class MainActivity extends ActionBarActivity implements SurfaceHolder.Callback, OnClickListener
{
private static final int VIDEO_START_HACK_DELAY = 0;
private static final String BG_VIDEO_PATH = "/raw/construction";
private SurfaceView mSurface;
private Button mTour, mLogin;
private MediaPlayer mMediaPlayer;
private Handler mHandler = new Handler();
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_start_main);
setupUI();
}
private void setupUI()
{
mMediaPlayer = new MediaPlayer();
mSurface = (SurfaceView) findViewById(R.id.surface);
SurfaceHolder holder = mSurface.getHolder();
holder.addCallback(this);
mTour = (Button) findViewById(R.id.tour);
mLogin = (Button) findViewById(R.id.login);
mTour.setOnClickListener(this);
mLogin.setOnClickListener(this);
}
@Override
public void surfaceCreated(SurfaceHolder holder)
{
startVideo(holder);
}
@SuppressLint("NewApi")
public void startVideo(SurfaceHolder holder)
{
String path = "android.resource://" + getPackageName() + BG_VIDEO_PATH;
Uri uri = Uri.parse(path);
try
{
android.view.ViewGroup.LayoutParams lp = mSurface.getLayoutParams();
mMediaPlayer.setDisplay(holder);
mMediaPlayer.setDataSource(this, uri);
mMediaPlayer.setVideoScalingMode(MediaPlayer.VIDEO_SCALING_MODE_SCALE_TO_FIT_WITH_CROPPING);
mMediaPlayer.setLooping(true);
mMediaPlayer.setOnPreparedListener(new OnPreparedListener()
{
@Override
public void onPrepared(MediaPlayer mp)
{
mHandler.postDelayed(new Runnable()
{
@Override
public void run()
{
mMediaPlayer.start();
}
}, VIDEO_START_HACK_DELAY);
}
});
mMediaPlayer.prepareAsync();
}
catch (Exception e)
{
Log.e("VID", "Problem starting video bg", e);
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height)
{
// TODO Auto-generated method stub
}
@Override
public void surfaceDestroyed(SurfaceHolder holder)
{
// TODO Auto-generated method stub
}
@Override
public void onBackPressed()
{
mSurface.setVisibility(View.INVISIBLE);
mMediaPlayer.stop();
super.onBackPressed();
}
@Override
protected void onDestroy()
{
mMediaPlayer.stop();
mMediaPlayer.release();
super.onDestroy();
}
}
这是布局文件：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<SurfaceView
android:id="@+id/surface"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginBottom="40dp"
android:gravity="center"
android:orientation="vertical" >
<Button
android:id="@+id/tour"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:textAppearance="@style/Base.TextAppearance.AppCompat.Medium"
android:padding="10dp"
android:text="@string/ma_tour"/>
<Button
android:id="@+id/login"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:padding="10dp"
android:textAppearance="@style/Base.TextAppearance.AppCompat.Medium"
android:text="@string/ma_log_in"/>
</LinearLayout>
</RelativeLayout>
Target sdk 设置为 22。您是否可能遇到过这种行为并可以提供任何建议？