如何在媒体播放器中播放音频文件

时间：2016-07-14 06:36:53

标签： audio android-intent media-player android-sdcard playback

这是我的代码附加媒体播放器但不播放声音

public class MainActivity extends AppCompatActivity {
ImageView choose;
private MediaPlayer mMediaPlayer;
private String[] mMusicList;
private ImageView b1, b2, b3, b4;
private ImageView iv;
private double startTime = 0;
private double finalTime = 0;
private Handler myHandler = new Handler();
;
private int forwardTime = 5000;
private int backwardTime = 5000;
private SeekBar seekbar;
private TextView tx1, tx2, tx3;
public static int oneTimeOnly = 0;
Uri uri;
String path;



@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    choose = (ImageView) findViewById(R.id.choose);

    b1 = (ImageView) findViewById(R.id.button);
    b2 = (ImageView) findViewById(R.id.button2);
    b3 = (ImageView) findViewById(R.id.button3);
    b4 = (ImageView) findViewById(R.id.button4);
    iv = (ImageView) findViewById(R.id.imageView);

    tx1 = (TextView) findViewById(R.id.textView2);
    tx2 = (TextView) findViewById(R.id.textView3);
    tx3 = (TextView) findViewById(R.id.textView4);




    seekbar = (SeekBar) findViewById(R.id.seekBar);
    seekbar.setClickable(false);
    b2.setEnabled(false);


    b3.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(getApplicationContext(), "Playing sound", Toast.LENGTH_SHORT).show();
               mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
          }

            mMediaPlayer = new MediaPlayer();
            mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

            try {

                mMediaPlayer.setDataSource(MainActivity.this, Uri.parse(path));
                // Toast.makeText(MainActivity.this, mMediaPlayer.setDataSource(getApplicationContext(), contentUri), Toast.LENGTH_SHORT).show();
            } catch (IOException e) {
                e.printStackTrace();
            }

            try {
                mMediaPlayer.prepare();
            } catch (IOException e) {
                e.printStackTrace();
            }


            mMediaPlayer.start();

            finalTime = mMediaPlayer.getDuration();
            startTime = mMediaPlayer.getCurrentPosition();

            if (oneTimeOnly == 0) {
                seekbar.setMax((int) finalTime);
                oneTimeOnly = 1;
            }
            tx2.setText(String.format("%d min, %d sec",
                    TimeUnit.MILLISECONDS.toMinutes((long) finalTime),
                    TimeUnit.MILLISECONDS.toSeconds((long) finalTime) -
                            TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes((long) finalTime)))
            );

            tx1.setText(String.format("%d min, %d sec",
                    TimeUnit.MILLISECONDS.toMinutes((long) startTime),
                    TimeUnit.MILLISECONDS.toSeconds((long) startTime) -
                            TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes((long) startTime)))
            );

            seekbar.setProgress((int) startTime);
            myHandler.postDelayed(UpdateSongTime, 100);
            b2.setEnabled(true);
            b3.setEnabled(false);
        }
    });

    b2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(getApplicationContext(), "Pausing sound", Toast.LENGTH_SHORT).show();
            mMediaPlayer.pause();
            b2.setEnabled(false);
            b3.setEnabled(true);
        }
    });

    b1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            int temp = (int) startTime;

            if ((temp + forwardTime) <= finalTime) {
                startTime = startTime + forwardTime;
                mMediaPlayer.seekTo((int) startTime);
                Toast.makeText(getApplicationContext(), "You have Jumped forward 5 seconds", Toast.LENGTH_SHORT).show();
            } else {
                Toast.makeText(getApplicationContext(), "Cannot jump forward 5 seconds", Toast.LENGTH_SHORT).show();
            }
        }
    });

    b4.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            int temp = (int) startTime;

            if ((temp - backwardTime) > 0) {
                startTime = startTime - backwardTime;
                mMediaPlayer.seekTo((int) startTime);
                Toast.makeText(getApplicationContext(), "You have Jumped backward 5 seconds", Toast.LENGTH_SHORT).show();
            } else {
                Toast.makeText(getApplicationContext(), "Cannot jump backward 5 seconds", Toast.LENGTH_SHORT).show();
            }
        }
    });

    choose.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            Intent intent_upload = new Intent();
            intent_upload.setType("audio/*");
            intent_upload.setAction(Intent.ACTION_GET_CONTENT);
            startActivityForResult(intent_upload, 1);



        }
    });


}


private Runnable UpdateSongTime = new Runnable() {
    public void run() {
        startTime = mMediaPlayer.getCurrentPosition();
        tx1.setText(String.format("%d min, %d sec",

                TimeUnit.MILLISECONDS.toMinutes((long) startTime),
                TimeUnit.MILLISECONDS.toSeconds((long) startTime) -
                        TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.
                                toMinutes((long) startTime)))
        );
        seekbar.setProgress((int) startTime);
        myHandler.postDelayed(this, 100);
    }
};





protected void onActivityResult(int requestCode, int resultCode, Intent data) {


    if (requestCode == 1) {
        if (resultCode == RESULT_OK) {


                uri = data.getData();

                Cursor returnCursor = getContentResolver().query(uri, null, null, null, null);
                int nameIndex = returnCursor.getColumnIndex(OpenableColumns.DISPLAY_NAME);
                returnCursor.moveToFirst();
                path = uri.getPath();
                Toast.makeText(MainActivity.this, path, Toast.LENGTH_LONG).show();


            // song.setText(returnCursor.getString(nameIndex));
        }
    }
    super.onActivityResult(requestCode, resultCode, data);
}

}

此代码选择按钮选择音频文件并选择音频歌曲

传递uri媒体播放器后解析uri附加网址但不播放声音

我看到并使用了许多代码，但没有使用此

请帮帮我 感谢前进

1 个答案:

答案 0 :(得分：1)

public class MainActivity extends AppCompatActivity {
private static final int SOUND_LOAD_REQUEST = 1;
ImageView choose;
private MediaPlayer mMediaPlayer;
private String[] mMusicList;
private ImageView b1, b2, b3, b4;
private ImageView iv;
private double startTime = 0;
private double finalTime = 0;
private Handler myHandler = new Handler();
;
private int forwardTime = 5000;
private int backwardTime = 5000;
private SeekBar seekbar;
private TextView tx1, tx2, tx3;
public static int oneTimeOnly = 0;
Uri uri;
String path;
String ringtoneTitle;
Uri soundUri;



@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    choose = (ImageView) findViewById(R.id.choose);

    b1 = (ImageView) findViewById(R.id.button);
    b2 = (ImageView) findViewById(R.id.button2);
    b3 = (ImageView) findViewById(R.id.button3);
    b4 = (ImageView) findViewById(R.id.button4);
    iv = (ImageView) findViewById(R.id.imageView);

    tx1 = (TextView) findViewById(R.id.textView2);
    tx2 = (TextView) findViewById(R.id.textView3);
    tx3 = (TextView) findViewById(R.id.textView4);
    mMediaPlayer = new MediaPlayer();


    seekbar = (SeekBar) findViewById(R.id.seekBar);
    seekbar.setClickable(false);
    b2.setEnabled(false);

    b2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(getApplicationContext(), "Pausing sound", Toast.LENGTH_SHORT).show();
            mMediaPlayer.pause();
            b2.setEnabled(false);
            b3.setEnabled(true);
        }
    });

    b1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            int temp = (int) startTime;

            if ((temp + forwardTime) <= finalTime) {
                startTime = startTime + forwardTime;
                mMediaPlayer.seekTo((int) startTime);
                Toast.makeText(getApplicationContext(), "You have Jumped forward 5 seconds", Toast.LENGTH_SHORT).show();
            } else {
                Toast.makeText(getApplicationContext(), "Cannot jump forward 5 seconds", Toast.LENGTH_SHORT).show();
            }
        }
    });

    b4.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            int temp = (int) startTime;

            if ((temp - backwardTime) > 0) {
                startTime = startTime - backwardTime;
                mMediaPlayer.seekTo((int) startTime);
                Toast.makeText(getApplicationContext(), "You have Jumped backward 5 seconds", Toast.LENGTH_SHORT).show();
            } else {
                Toast.makeText(getApplicationContext(), "Cannot jump backward 5 seconds", Toast.LENGTH_SHORT).show();
            }
        }
    });

    choose.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent loadIntent = new Intent();
            loadIntent.setAction(Intent.ACTION_GET_CONTENT);
            loadIntent.setType("audio/*");
            startActivityForResult(createChooser(loadIntent, "Select Audio"), SOUND_LOAD_REQUEST);

        }
    });


}


private Runnable UpdateSongTime = new Runnable() {
    public void run() {
        startTime = mMediaPlayer.getCurrentPosition();
        tx1.setText(String.format("%d min, %d sec",

                TimeUnit.MILLISECONDS.toMinutes((long) startTime),
                TimeUnit.MILLISECONDS.toSeconds((long) startTime) -
                        TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.
                                toMinutes((long) startTime)))
        );
        seekbar.setProgress((int) startTime);
        myHandler.postDelayed(this, 100);
    }
};






protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == SOUND_LOAD_REQUEST)
        if (resultCode == RESULT_OK) {

             soundUri = data.getData();

            try {
                mMediaPlayer.setDataSource(this, soundUri);
            } catch (IOException e) {
                e.printStackTrace();
            }
            mMediaPlayer.prepareAsync();

            b3.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {

                    mMediaPlayer.start();
                    Toast.makeText(getApplicationContext(), "Playing sound", Toast.LENGTH_SHORT).show();

                    finalTime = mMediaPlayer.getDuration();
                    startTime = mMediaPlayer.getCurrentPosition();

                    if (oneTimeOnly == 0) {
                        seekbar.setMax((int) finalTime);
                        oneTimeOnly = 1;
                    }
                    tx2.setText(String.format("%d min, %d sec",
                            TimeUnit.MILLISECONDS.toMinutes((long) finalTime),
                            TimeUnit.MILLISECONDS.toSeconds((long) finalTime) -
                                    TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes((long) finalTime)))
                    );

                    tx1.setText(String.format("%d min, %d sec",
                            TimeUnit.MILLISECONDS.toMinutes((long) startTime),
                            TimeUnit.MILLISECONDS.toSeconds((long) startTime) -
                                    TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes((long) startTime)))
                    );

                    seekbar.setProgress((int) startTime);
                    myHandler.postDelayed(UpdateSongTime, 100);
                    b2.setEnabled(true);
                    b3.setEnabled(false);
                }
            });
        }
}

 }

此代码终于正常工作

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