问题：
从 v4 升级项目后，找不到类“android.support.v7.app.通知Compat$Builder”。
刘凡
从 v4 升级项目后，找不到类“android.support.v7.app.通知Compat$Builder”。
我正在尝试使用通知来管理我的媒体播放器控件。
根据这个问题，我需要在我的项目中使用< code > Android . support . V7 . app . notification compat 来进一步研究锁屏控件。
https://stackoverflow.com/a/31013955/3126760
我已将支持库更新到 23.0.1
当我试图构建下面的代码时
public class player6 extends Service implements OnCompletionListener,
OnPreparedListener, OnErrorListener, OnSeekCompleteListener,
OnInfoListener, OnBufferingUpdateListener {
final int NOTIFICATION_ID = 1;
public static final String EXTRA_AUDIO_URL = "audio_url";
public static final String BROADCAST_PLAYBACK_STOP = "stop",
BROADCAST_PLAYBACK_PAUSE = "pause",
BROADCAST_PLAYBACK_NEXT = "next",
BROADCAST_PLAYBACK_PREVIOUS = "previous",
BROADCAST_PLAYBACK_SHUFFLE = "shuffle",
BROADCAST_PLAYBACK_REPEAT = "repeat";
int song_aLBUM;
private boolean isShuffle = false;
private boolean isRepeat = false;
ArrayList<String> songs;
Cursor cursor;
Uri uri;
Bundle b;
private int index;
Button play, next, back, eqaulize;
ArrayList<String> MultilistArray;
MediaPlayer mediaPlayer;
String url;
String x;
// seekbar variables for processing
String sntSeekPos;
int intSeekPos;
int mediaPosition;
int mediaMax;
private final Handler handler = new Handler();
private static int songEnded;
public static final String BROADCAST_ACTION = "com.example.classanimate.seekprogress";
Intent bufferIntent;
Intent seekIntent;
//lolipop
private MediaSessionManager mManager;
private MediaSession mSession;
private MediaController mController;
final BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (action.equals(BROADCAST_PLAYBACK_STOP))
stopSelf();
else if (action.equals(BROADCAST_PLAYBACK_PAUSE)) {
if (mediaPlayer.isPlaying())
mediaPlayer.pause();
else
mediaPlayer.start();
} else if (action.equals(BROADCAST_PLAYBACK_NEXT)) {
playnext();
} else if (action.equals(BROADCAST_PLAYBACK_PREVIOUS)) {
playprevious();
} else if (action.equals(BROADCAST_PLAYBACK_SHUFFLE)) {
playShuffle();
} else if (action.equals(BROADCAST_PLAYBACK_REPEAT)) {
playRepeat();
} else if (action.equals(playeractivity.BROADCAST_SEEKBAR)) {
updateSeekPos(intent);
}
}
};
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
b = intent.getExtras();
index = b.getInt("position");
MultilistArray = intent.getStringArrayListExtra("multilist");
getMusic();
playSong(index);
showNotification();
setupHandler();
return START_STICKY;
}
@Override
public void onCreate() {
seekIntent = new Intent(BROADCAST_ACTION);
mediaPlayer = new MediaPlayer();
mediaPlayer.setOnSeekCompleteListener(this);
mediaPlayer.setOnCompletionListener(this);
mediaPlayer.setOnPreparedListener(this);
mediaPlayer.setOnErrorListener(this);
mediaPlayer.setOnSeekCompleteListener(this);
mediaPlayer.setOnInfoListener(this);
mediaPlayer.setOnBufferingUpdateListener(this);
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(BROADCAST_PLAYBACK_STOP);
intentFilter.addAction(BROADCAST_PLAYBACK_PAUSE);
intentFilter.addAction(BROADCAST_PLAYBACK_NEXT);
intentFilter.addAction(BROADCAST_PLAYBACK_PREVIOUS);
intentFilter.addAction(BROADCAST_PLAYBACK_SHUFFLE);
intentFilter.addAction(BROADCAST_PLAYBACK_REPEAT);
intentFilter.addAction(playeractivity.BROADCAST_SEEKBAR);
// LocalBroadcastManager.getInstance(this).
registerReceiver(broadcastReceiver, intentFilter);
}
public void getMusic() {
// TODO Auto-generated method stub
for (Iterator iterator = MultilistArray.iterator(); iterator.hasNext();) {
x = (String) iterator.next();
// do some stuff
}
uri = android.provider.MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
String projection[] = { android.provider.MediaStore.Audio.Media.DATA,
android.provider.MediaStore.Audio.Media.TITLE,
android.provider.MediaStore.Audio.Media.ARTIST,
android.provider.MediaStore.Audio.Media.ALBUM,
android.provider.MediaStore.Audio.Media.COMPOSER,
android.provider.MediaStore.Audio.Media.DURATION,
MediaStore.Audio.Media._ID,
// android.provider.MediaStore.Audio.Albums.ALBUM_ART,
android.provider.MediaStore.Audio.Media.ALBUM_ID };
String selection1 = MediaStore.Audio.Media._ID + " IN(";
// String[] selectionArgs = "{";
for (int i = 0; i < MultilistArray.size(); i++) {
selection1 += "?, ";
}
selection1 = selection1.substring(0, selection1.length() - 2) + ")";
String[] selectionArgs = new String[MultilistArray.size()];
selectionArgs = MultilistArray.toArray(selectionArgs);
cursor = this.getContentResolver().query(uri, projection, selection1,
selectionArgs, null);
songs = new ArrayList<String>();
cursor.moveToFirst();
while (!cursor.isAfterLast()) {
songs.add(cursor.getString(2));
cursor.moveToNext();
}
}
public void playSong(int index2) {
// public void playSong() {
if (b.getInt("position") != 0) {
cursor.moveToPosition(0);
}
else{
cursor.moveToPosition(index);
}
int song_id = cursor
.getColumnIndex(android.provider.MediaStore.Audio.Media.DATA);
String song_name = cursor.getString(cursor
.getColumnIndex(android.provider.MediaStore.Audio.Media.DATA));
song_aLBUM = cursor
.getColumnIndex(android.provider.MediaStore.Audio.Media.ALBUM);
String song_album_name = cursor.getString(song_aLBUM);
SongDetailsId();
try {
mediaPlayer.reset();
mediaPlayer.setDataSource(song_name);
mediaPlayer.prepare();
// sb.setMax(mediaplayer.getDuration());
mediaPlayer.start();
// int totalDuration = mediaplayer.getDuration();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public void onCompletion(MediaPlayer mp) {
// stopSelf();
if (isRepeat) {
// repeat is on play same song again
playSong(index);
} else if (isShuffle) {
// shuffle is on - play a random song
Random rand = new Random();
index = rand.nextInt((songs.size() - 1) - 0 + 1) + 0;
playSong(index);
} else {
// no repeat or shuffle ON - play next song
if (index < (songs.size() - 1)) {
playSong(index + 1);
index = index + 1;
} else {
// play first song
playSong(0);
index = 0;
}
}
}
@Override
public void onPrepared(MediaPlayer mp) {
Log.d("Service", "MediaPlayer prepared. Music will play now.");
mediaPlayer.start();
}
@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
private PendingIntent makePendingIntent(String broadcast) {
Intent intent = new Intent(broadcast);
return PendingIntent
.getBroadcast(getApplicationContext(), 0, intent, 0);
}
private void showNotification() {
// Create notification
Builder notificationBuilder = (Builder) new NotificationCompat.Builder(
this)
.setSmallIcon(R.drawable.ic_launcher)
.setContentTitle(getString(R.string.app_name))
.setContentText(this.url)
// audio url will show in notification
.setContentIntent(
PendingIntent.getActivity(getApplicationContext(), 0,
new Intent(getApplicationContext(),
player6.class), 0))
.addAction(R.drawable.ic_action_play, "Stop",
makePendingIntent(BROADCAST_PLAYBACK_STOP))
.addAction(R.drawable.ic_action_pause, "Pause",
makePendingIntent(BROADCAST_PLAYBACK_PAUSE))
.addAction(R.drawable.img_btn_forward, "next",
makePendingIntent(BROADCAST_PLAYBACK_NEXT));
// Show notification
startForeground(NOTIFICATION_ID, notificationBuilder.build());
}
private void playnext() {
// TODO Auto-generated method stub
if (isShuffle) {
// shuffle is on - play a random song
Random rand = new Random();
index = rand.nextInt((songs.size() - 1) - 0 + 1) + 0;
playSong(index);
} else {
if (index < (songs.size() - 1)) {
index += 1;
// sb.setMax(mediaplayer.getDuration());
playSong(index);
} else {
index = 0;
playSong(index);
}
}
}
private void playprevious() {
// TODO Auto-generated method stub
if (isShuffle) {
// shuffle is on - play a random song
Random rand = new Random();
index = rand.nextInt((songs.size() - 1) - 0 + 1) + 0;
playSong(index);
} else {
if (index > 0) {
index -= 1;
playSong(index);
} else {
index = songs.size() - 1;
playSong(index);
}
}
}
private void playShuffle() {
// TODO Auto-generated method stub
Toast.makeText(this, "playShuffle", Toast.LENGTH_SHORT).show();
if (isShuffle) {
isShuffle = false;
playeractivity.shuffle.setText("Shuffle is OFF");
} else {
// make repeat to true
isShuffle = true;
// make shuffle to false
isRepeat = false;
playeractivity.shuffle.setText("Shuffle is ON");
playeractivity.repeat.setText("Repeat is OFF");
}
}
private void playRepeat() {
// TODO Auto-generated method stub
Toast.makeText(this, "btrepeat", Toast.LENGTH_SHORT).show();
if (isRepeat) {
isRepeat = false;
playeractivity.repeat.setText("Repeat is OFF");
} else {
// make repeat to true
isRepeat = true;
isShuffle = false;
playeractivity.repeat.setText("Repeat is ON");
playeractivity.shuffle.setText("Shuffle is OFF");
// btnShuffle.setImageResource(R.drawable.btn_shuffle);
}
}
@Override
public void onBufferingUpdate(MediaPlayer mp, int percent) {
// TODO Auto-generated method stub
}
@Override
public boolean onInfo(MediaPlayer mp, int what, int extra) {
// TODO Auto-generated method stub
return false;
}
@Override
public void onSeekComplete(MediaPlayer mp) {
// TODO Auto-generated method stub
if (!mediaPlayer.isPlaying()) {
playSong(index);
}
}
@Override
public boolean onError(MediaPlayer mp, int what, int extra) {
// TODO Auto-generated method stub
return false;
}
private void setupHandler() {
handler.removeCallbacks(sendUpdatesToUI);
handler.postDelayed(sendUpdatesToUI, 500);
}
private Runnable sendUpdatesToUI = new Runnable() {
@Override
public void run() {
LogMediaPosition();
handler.postDelayed(this, 500);
}
};
private void LogMediaPosition() {
// TODO Auto-generated method stub
if (mediaPlayer.isPlaying()) {
mediaPosition = mediaPlayer.getCurrentPosition();
mediaMax = mediaPlayer.getDuration();
seekIntent.putExtra("counter", String.valueOf(mediaPosition));
seekIntent.putExtra("mediamax", String.valueOf(mediaMax));
seekIntent.putExtra("song_ended", String.valueOf(songEnded));
sendBroadcast(seekIntent);
}
}
public void updateSeekPos(Intent intent) {
int seekPos = intent.getIntExtra("seekpos", 0);
if (mediaPlayer.isPlaying()) {
handler.removeCallbacks(sendUpdatesToUI);
// Toast.makeText(this, "positon" + seekPos,
// Toast.LENGTH_SHORT).show();
mediaPlayer.seekTo(seekPos);
setupHandler();
}
}
@Override
public void onDestroy() // called when the service is stopped
{
mediaPlayer.stop();
stopForeground(true);
handler.removeCallbacks(sendUpdatesToUI);
unregisterReceiver(broadcastReceiver);
super.onDestroy();
}
public void SongDetailsId() {
Intent intent = new Intent(playeractivity.SONG_DETAILS);
intent.putExtra("value", index);
sendBroadcast(intent);
}
}
我在日志猫中得到以下错误
10-16 10:07:02.742:E/dalvikvm（1134）：找不到类“android.support.v7.app”。NotificationCompat$Builder’，从com.example.multiplayer.player6.showNotification方法引用。
这些是我的进口货
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Random;
import android.app.PendingIntent;
import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.database.Cursor;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnBufferingUpdateListener;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaPlayer.OnErrorListener;
import android.media.MediaPlayer.OnInfoListener;
import android.media.MediaPlayer.OnPreparedListener;
import android.media.MediaPlayer.OnSeekCompleteListener;
import android.media.session.MediaController;
import android.media.session.MediaSession;
import android.media.session.MediaSessionManager;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.provider.MediaStore;
import android.support.v7.app.NotificationCompat;
import android.support.v7.app.NotificationCompat.Builder;
import android.util.Log;
import android.widget.Button;
import android.widget.Toast;
现在我知道我是否会使用导入android.support.v4.app.NotificationCompat；它可以解决我目前的问题，但我需要使用导入android.support.v7.app.NotificationCompat用于我未来的工作。
问题出现在
private void showNotification() {
// Create notification
Builder notificationBuilder = (Builder) new NotificationCompat.Builder(
this)
.setSmallIcon(R.drawable.ic_launcher)
.setContentTitle(getString(R.string.app_name))
.setContentText(this.url)
// audio url will show in notification
.setContentIntent(
PendingIntent.getActivity(getApplicationContext(), 0,
new Intent(getApplicationContext(),
player6.class), 0))
.addAction(R.drawable.ic_action_play, "Stop",
makePendingIntent(BROADCAST_PLAYBACK_STOP))
.addAction(R.drawable.ic_action_pause, "Pause",
makePendingIntent(BROADCAST_PLAYBACK_PAUSE))
.addAction(R.drawable.img_btn_forward, "next",
makePendingIntent(BROADCAST_PLAYBACK_NEXT));
// Show notification
startForeground(NOTIFICATION_ID, notificationBuilder.build());
}
我已经尝试了很多方法，包括使用android.support.v4.app.NotificationCompat。生成器通知生成器=
并且还试图添加演员（BULIDER），但每次我都会得到相同的错误。
如何使用android.support.v7.app。NotificationCompat与生成器
共有2个答案
墨翔宇
一切看起来都还行，试一试
- 导入android.support.v7.app.NotificationCompat；
- 您不需要NotificationBuilder使用
Notification notificationBuilder = new NotificationCompat.Builder(
this)
.setSmallIcon(R.drawable.music)
.setContentTitle(getString(R.string.app_name))
.setContentText(this.url)
// audio url will show in notification
.setContentIntent(
PendingIntent.getActivity(getApplicationContext(), 0,
new Intent(getApplicationContext(),
player6.class), 0))
.addAction(R.drawable.ic_stat_pause_100, "Stop",
makePendingIntent(BROADCAST_PLAYBACK_STOP))
.addAction(R.drawable.ic_stat_pause_100, "Pause",
makePendingIntent(BROADCAST_PLAYBACK_PAUSE))
.addAction(R.drawable.ic_stat_circled_right_2_100, "next",
makePendingIntent(BROADCAST_PLAYBACK_NEXT)).build();
// Show notification
startForeground(NOTIFICATION_ID, notificationBuilder);
常俊爽
这帮助了我
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this);
notificationBuilder.setSmallIcon(R.drawable.ic_stat_ic_notification);
诸如此类。我不知道为什么这必须如此格式化，但它对我来说很有用。
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