专辑封面滑动失败，并出现 JNI 错误

Question

我正在使用滑动库在我的音乐播放器应用程序中显示专辑封面。但我不知道为什么它不起作用.

这是java文件：PlayListActivity.java

package com.example.dell_1.myapp3;

import android.app.Activity;
import android.database.Cursor;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import java.io.File;
import java.io.IOException;
import com.bumptech.glide.Glide;
public class PlayListActivity extends Activity {
private String[] mAudioPath;
private MediaPlayer mMediaPlayer;
private String[] mMusicList;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_play_list);
mMediaPlayer = new MediaPlayer();
ListView mListView = (ListView) findViewById(R.id.list);
mMusicList = getAudioList();
ArrayAdapter<String> mAdapter = new ArrayAdapter<>(this,
android.R.layout.simple_list_item_1, mMusicList);
mListView.setAdapter(mAdapter);
mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View view, int arg2,
long arg3) {
try {
playSong(mAudioPath[arg2]);
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
private String[] getAudioList() {
final Cursor mCursor = getContentResolver().query(
MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
new String[]{MediaStore.Audio.Media.DISPLAY_NAME, MediaStore.Audio.Media.DATA}, null, null,
"LOWER(" + MediaStore.Audio.Media.TITLE + ") ASC");
int count = mCursor.getCount();
String[] songs = new String[count];
mAudioPath = new String[count];
int i = 0;
if (mCursor.moveToFirst()) {
do {
songs[i] = mCursor.getString(mCursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DISPLAY_NAME));
mAudioPath[i] = mCursor.getString(mCursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA));
i++;
} while (mCursor.moveToNext());
}
mCursor.close();
return songs;
}
private void playSong(String path) throws IllegalArgumentException,
IllegalStateException, IOException {
setContentView(R.layout.activity_android_building_music_player);
Log.d("ringtone", "playSong :: " + path);
mMediaPlayer.reset();
mMediaPlayer.setDataSource(path);
//mMediaPlayer.setLooping(true);
mMediaPlayer.prepare();
mMediaPlayer.start();
asd();
}
public void asd() {
ImageView imageView = (ImageView) findViewById(R.id.coverart);

File music = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC);
// Tested with music from Windows 7's c:UsersPublicMusicSample Music
String filePath = new File(music, "I love you.mp3").getAbsolutePath();
Glide
.with(this)
.load(new AudioCover(filePath))
.placeholder(R.drawable.adele1)
.error(R.drawable.adele1)
.into(imageView)
;
}
}

这是 xml 文件： activity_play_list.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<ListView
android:id="@+id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:divider="#242424"
android:dividerHeight="1dp"
android:listSelector="@drawable/list_selector" />
</LinearLayout>

activity_android_building_music_player.xml

<?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"
>
<LinearLayout
android:id="@+id/player_header_bg"
android:layout_width="fill_parent"
android:layout_height="60dip"
android:layout_alignParentTop="true"
android:background="@layout/bg_player_header"
android:paddingLeft="5dp"
android:paddingRight="5dp">
<TextView
android:id="@+id/songTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_weight="1"
android:paddingLeft="50dp"
android:text="The Good, The Bad And The Ugly"
android:textColor="#04b3d2"
android:textSize="16dp"
android:textStyle="bold" />
<ImageButton
android:id="@+id/btnPlaylist"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:background="@null"
android:src="@drawable/btn_playlist" />
</LinearLayout>
<LinearLayout
android:id="@+id/songThumbnail"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/player_header_bg"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:gravity="center"
android:paddingBottom="10dp"
android:paddingTop="10dp">
<ImageView
android:id="@+id/coverart"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
<LinearLayout
android:id="@+id/player_footer_bg"
android:layout_width="fill_parent"
android:layout_height="100dp"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:background="@layout/bg_player_footer"
android:gravity="center">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:weightSum="1">
<RelativeLayout
android:layout_width="300dp"
android:layout_height="match_parent">
<ImageButton
android:id="@+id/btnPrevious"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="2.40"
android:layout_alignParentLeft="true"
android:paddingLeft="10dp"
android:background="@null"
android:src="@drawable/btn_previous" />
<ImageButton
android:id="@+id/btnPlay1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:background="@null"
android:src="@drawable/btn_play"
android:onClick="buttonAction1"/>

<ImageButton
android:id="@+id/btnNext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="250dp"
android:background="@null"
android:src="@drawable/btn_next" />
</RelativeLayout>
</LinearLayout>
</LinearLayout>
<SeekBar
android:id="@+id/songProgressBar"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_above="@+id/player_footer_bg"
android:layout_alignLeft="@+id/timerDisplay"
android:layout_alignStart="@+id/timerDisplay"
android:layout_marginBottom="10dp"
android:paddingLeft="6dp"
android:paddingRight="6dp"
android:progressDrawable="@drawable/seekbar_progress"
android:thumb="@drawable/download8" />
<LinearLayout
android:id="@+id/timerDisplay"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_above="@id/songProgressBar"
android:layout_marginBottom="10dp"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp">
<TextView
android:id="@+id/songCurrentDurationLabel"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="left"
android:textColor="#eeeeee"
android:textStyle="bold" />
<TextView
android:id="@+id/songTotalDurationLabel"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="right"
android:textColor="#04cbde"
android:textStyle="bold" />
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_above="@id/timerDisplay"
android:gravity="center">
<ImageButton
android:id="@+id/btnRepeat"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="5dp"
android:background="@null"
android:src="@drawable/btn_repeat" />
<ImageButton
android:id="@+id/btnShuffle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:background="@null"
android:src="@drawable/btn_shuffle" />
</LinearLayout>
</RelativeLayout>

音频封面.java

package com.example.dell_1.myapp3;
import android.content.Context;
import android.media.MediaMetadataRetriever;
import com.bumptech.glide.*;
import com.bumptech.glide.load.data.DataFetcher;
import com.bumptech.glide.load.model.GenericLoaderFactory;
import com.bumptech.glide.load.model.ModelLoader;
import com.bumptech.glide.load.model.ModelLoaderFactory;
import com.bumptech.glide.load.model.stream.StreamModelLoader;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
public class AudioCover {
final String path;
public AudioCover(String path) {
this.path = path;
}
}
class AudioCoverLoader implements StreamModelLoader<AudioCover> {
@Override public DataFetcher<InputStream> getResourceFetcher(AudioCover model, int width, int height) {
return new AudioCoverFetcher(model);
}
static class Factory implements ModelLoaderFactory<AudioCover, InputStream> {
@Override public ModelLoader<AudioCover, InputStream> build(Context context, GenericLoaderFactory factories) {
return new AudioCoverLoader();
}
@Override public void teardown() {
}
}
}
class AudioCoverFetcher implements DataFetcher<InputStream> {
private final AudioCover model;
private FileInputStream stream;
public AudioCoverFetcher(AudioCover model) {
this.model = model;
}
@Override public String getId() {
return model.path;
}
@Override public InputStream loadData(Priority priority) throws Exception {
MediaMetadataRetriever retriever = new MediaMetadataRetriever();
try {
retriever.setDataSource(model.path);
byte[] picture = retriever.getEmbeddedPicture();
if (picture != null) {
return new ByteArrayInputStream(picture);
} else {
return fallback(model.path);
}
} finally {
retriever.release();
}
}
private static final String[] FALLBACKS = {"cover.jpg", "album.jpg", "folder.jpg"};
private InputStream fallback(String path) throws FileNotFoundException {
File parent = new File(path).getParentFile();
for (String fallback : FALLBACKS) {
// TODO make it smarter by enumerating folder contents and filtering for files
// example algorithm for that: http://askubuntu.com/questions/123612/how-do-i-set-album-artwork
File cover = new File(parent, fallback);
if (cover.exists()) {
return stream = new FileInputStream(cover);
}
}
return null;
}
@Override public void cleanup() {
// already cleaned up in loadData and ByteArrayInputStream will be GC'd
if (stream != null) {
try {
stream.close();
} catch (IOException ignore) {
// can't do much about it
}
}
}
@Override public void cancel() {
// cannot cancel
}
}

这是清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.dell_1.myapp3">
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_MEDIA_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission 
android:name="android.permission.MEDIA_CONTENT_CONTROL" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_MEDIA_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission 
android:name="android.permission.MEDIA_CONTENT_CONTROL" />
<uses-permission android:name="android.permission.INTERNET" />
<activity
android:name=".apples"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".Bacon1"
android:label="@string/title_activity_bacon1" />
<activity
android:name=".SDCard"
android:label="@string/title_activity_sdcard" />
<meta-data android:name="my.app.namespace.utils.GlideConfiguration"
android:value="GlideModule"/>

<activity
android:name=".PlayListActivity"
android:label="@string/title_activity_play_list"></activity>
</application>
</manifest>

我发现我在单击按钮4时收到以下错误：

07-11 17:11:04.222 13978-13978/com.example.dell_1.myapp3 E/ExtMediaPlayer-JNI: env->IsInstanceOf fails
07-11 17:11:04.222 13978-13978/com.example.dell_1.myapp3 E/MediaPlayer-JNI: JNIMediaPlayerFactory: bIsQCMediaPlayerPresent 0
07-11 17:11:04.222 13978-13978/com.example.dell_1.myapp3 E/ExtMediaPlayer-JNI: env->IsInstanceOf fails
07-11 17:11:04.222 13978-13978/com.example.dell_1.myapp3 E/MediaPlayer-JNI: JNIMediaPlayerFactory: bIsQCMediaPlayerPresent 0

Answer 1

您是否提供了对AndroidManifest.xml文件的必要访问权限？