我正在构建使用恢复/暂停功能进行m4a录制的Android应用。
有可能吗?如果可以,请告诉我解决方法。
谢谢
最佳答案
如果需要播放音频/视频资源,则可以使用MediaPlayer对象,如果有特殊需要,可以包装它。特别是,要显示视频,需要SurfaceView及其支架。无论如何,它的工作原理如下:
假设您的媒体资源位于原始文件夹中,则媒体播放器可以是这样的:
import android.content.Context;
import android.media.MediaPlayer;
public class MyPlayer {
private MediaPlayer mPlayer;
private SurfaceHolder mSurfaceHolder;
public void play(Context c) {
if (mPlayer == null) {
mPlayer = MediaPlayer.create(c, R.<YOUR RESOURCE NAME>);
mPlayer.setDisplay(mSurfaceHolder);
//Sets a listener to the mPlayer variable that set's it to null once the playing is finished
mPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
stop();
}
});
}
mPlayer.start();
}
public void pause() {
if (mPlayer.isPlaying()) {
mPlayer.pause();
}
}
public void stop() {
if (mPlayer != null) {
mPlayer.release();
mPlayer = null;
}
}
public void setSurface(SurfaceHolder sh) {
mSurfaceHolder = sh;
}
}
播放器将封装在片段/ Activity 中。假设有一个XML布局,其中SurfaceView作为“屏幕”和三个用于媒体控制的按钮,您的片段将像:
public class PlayerFragment extends Fragment {
private Button mPlayButton;
private Button mPauseButton;
private Button mStopButton;
private SurfaceView mSurface;
private SurfaceHolder mHolder;
private MyPlayer mPlayer = new MyPlayer();
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState) {
//Gets the view and sets the player to be able to play a video resource
View v = inflater.inflate(R.layout.<YOUR XML LAYOUT>, parent, false);
mSurface = (SurfaceView) v.findViewById(R.id.surface);
mHolder = mSurface.getHolder();
mHolder.setKeepScreenOn(true);
mPlayer.setSurface(mHolder);
//Inflates the play button and sets on it a listener (created as an anonymous class)
mPlayButton = (Button) v.findViewById(R.id.playButton);
mPlayButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mPlayer.play(getActivity());
}
});
//Inflates the pause button and sets on it a listener (created as an anonymous class)
mPauseButton = (Button) v.findViewById(R.id.pauseButton);
mPauseButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mPlayer.pause();
}
});
//Inflates the stop button and sets on it a listener (created as an anonymous class)
mStopButton = (Button) v.findViewById(R.id.stopButton);
mStopButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mPlayer.stop();
}
});
return v;
}
@Override
public void onDestroy() {
super.onDestroy();
mPlayer.stop();
}
}
自从使用完媒体资源或 Activity /片段被破坏以来,请务必小心并释放它们,因为您已获得了锁定。如果不这样做,可能会损害其他应用程序或操作系统的行为。
显然,如果您需要更复杂的功能,则必须添加它们。这只是一个非常简单的玩家的例子。还请记住,某些文件和/或设备可能会引起不兼容。
关于android - 如何在Android中实现恢复/暂停录音?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/26723976/