Android項目開發五-《星星生活志》1.使用MediaRecorder錄制音頻

代碼如下：

public class MainActivity extends Activity {

	File soundFile;//輸出文件
	MediaRecorder mRecorder;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
	    inintView();//初始化
	}
	//初始化
	private void inintView() {
		mRecorder = new MediaRecorder();
		//設置音頻來源
		mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
		//設置聲音輸出格式----一定要在編碼格式之前設置
		mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
		//設置聲音的編碼格式
		mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
	}
	//EventOfClick
	public void onClick(View view){
		switch(view.getId()){
		case R.id.record:
			try{
			//設置保存音樂的文件
				soundFile = new File(Environment
						.getExternalStorageDirectory()
						.getCanonicalFile()+/sound.amr);
				mRecorder.setOutputFile(soundFile.getAbsolutePath());
				mRecorder.prepare();
				//開始
				mRecorder.start();
			}catch(Exception e){
				e.printStackTrace();
			}
			break;
		case R.id.stop:
			if(soundFile!=null && soundFile.exists()){       //避免未用到造成空指針
				mRecorder.stop();
				mRecorder.release();
				mRecorder = null;
			}
			break;
		default:
			break;
		}
	}
	//釋放資源
	@Override
	protected void onDestroy() {
		if(soundFile!=null && soundFile.exists()){
			mRecorder.stop();
			mRecorder.release();
			mRecorder = null;
		}
		super.onDestroy();
	}
}

權限設置：

http://download.csdn.net/detail/u013670933/7362171