棉花糖权限错误
Marshmallow Permission Error
我正在处理音乐播放器应用程序，所以我必须从存储卡中获取所有歌曲我成功地从存储卡应用程序中获取歌曲并且在 Lollipop 上工作正常。
问题
Marshmallow 运行 时间权限我还添加了 运行 Marshmallow 的时间权限但应用程序仍然崩溃..
这是我的完整代码请告诉我在哪里写运行 Marshmallow 的时间许可。
public class MainActivity extends AppCompatActivity {
private int STORAGE_PERMISSION_CODE = 23;
ListView musiclist;
Cursor musiccursor;
int music_column_index;
int count;
MediaPlayer mMediaPlayer;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init_phone_music_grid();
if(isReadStorageAllowed()){
//If permission is already having then showing the toast
Toast.makeText(MainActivity.this,"You already have the permission",Toast.LENGTH_LONG).show();
//Existing the method with return
return;
}
//If the app has not the permission then asking for the permission
requestStoragePermission();
}
private void requestStoragePermission() {
if (ActivityCompat.shouldShowRequestPermissionRationale(this,Manifest.permission.READ_EXTERNAL_STORAGE)){
//If the user has denied the permission previously your code will come to this block
//Here you can explain why you need this permission
//Explain here why you need this permission
}
//And finally ask for the permission
ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},STORAGE_PERMISSION_CODE);
}
//This method will be called when the user will tap on allow or deny
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
//Checking the request code of our request
if(requestCode == STORAGE_PERMISSION_CODE){
//If permission is granted
if(grantResults.length >0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
//Displaying a toast
Toast.makeText(this,"Permission granted now you can read the storage",Toast.LENGTH_LONG).show();
}else{
//Displaying another toast if permission is not granted
Toast.makeText(this,"Oops you just denied the permission",Toast.LENGTH_LONG).show();
}
}
}
private boolean isReadStorageAllowed() {
int result = ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE);
if (result == PackageManager.PERMISSION_GRANTED)
return true;
return false;
}
private void init_phone_music_grid() {
System.gc();
String[] proj = { MediaStore.Audio.Media._ID,
MediaStore.Audio.Media.DATA,
MediaStore.Audio.Media.DISPLAY_NAME,
MediaStore.Video.Media.SIZE };
musiccursor = managedQuery(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
proj, null, null, null);
count = musiccursor.getCount();
musiclist = (ListView) findViewById(R.id.PhoneMusicList);
musiclist.setAdapter(new MusicAdapter(getApplicationContext()));
musiclist.setOnItemClickListener(musicgridlistener);
mMediaPlayer = new MediaPlayer();
}
private AdapterView.OnItemClickListener musicgridlistener = new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView parent, View v, int position,
long id) {
System.gc();
music_column_index = musiccursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA);
musiccursor.moveToPosition(position);
String filename = musiccursor.getString(music_column_index);
try {
if (mMediaPlayer.isPlaying()) {
mMediaPlayer.reset();
}
mMediaPlayer.setDataSource(filename);
mMediaPlayer.prepare();
mMediaPlayer.start();
} catch (Exception e) {
}
}
};
public class MusicAdapter extends BaseAdapter {
private Context mContext;
public MusicAdapter(Context c) {
mContext = c;
}
public int getCount() {
return count;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
System.gc();
TextView tv = new TextView(mContext.getApplicationContext());
String id = null;
if (convertView == null) {
music_column_index = musiccursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.DISPLAY_NAME);
musiccursor.moveToPosition(position);
id = musiccursor.getString(music_column_index);
music_column_index = musiccursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.SIZE);
musiccursor.moveToPosition(position);
id += " Size(KB):" + musiccursor.getString(music_column_index);
tv.setText(id);
} else
tv.setTextColor(Integer.parseInt(String.valueOf(R.color.colorAccent)));
tv = (TextView) convertView;
return tv;
}
}}
请不要标记重复只需更正我的许可
谢谢
崩溃报告：
E/AndroidRuntime：致命异常：main
进程：com.example.j.musicapp，PID：28606
java.lang.RuntimeException：无法启动 activity ComponentInfo{com.example.j.musicapp/com.example.j.musicapp.MainActivity}：java.lang.SecurityException：权限被拒绝：读取 com.android.providers.media.MediaProvider uri 内容：//media/external/audio/media 来自 pid=28606，uid=10161 需要 android.permission.READ_EXTERNAL_STORAGE，或 grantUriPermission()
在 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3319)
在 android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3415)
在 android.app.ActivityThread.access1100 美元（ActivityThread.java:229）
在 android.app.ActivityThread$H.handleMessage(ActivityThread.java:1821)
在 android.os.Handler.dispatchMessage(Handler.java:102)
在 android.os.Looper.loop(Looper.java:148)
在 android.app.ActivityThread.main(ActivityThread.java:7331)
在 java.lang.reflect.Method.invoke（本机方法）
在 com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
在 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
Caused by: java.lang.SecurityException: Permission Denial: reading com.android.providers.media.MediaProvider uri content://media/external/audio/media from pid=28606, uid=10161 requires android.permission.READ_EXTERNAL_STORAGE, 或者grantUriPermission()
在 android.os.Parcel.readException(Parcel.java:1621)
在 android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:183)
在 android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:135)
在 android.content.ContentProviderProxy.query(ContentProviderNative.java:421)
在 android.content.ContentResolver.query(ContentResolver.java:502)
在 android.content.ContentResolver.query(ContentResolver.java:445)
在 android.app.Activity.managedQuery(Activity.java:2227)
在 com.example.j.musicapp.MainActivity.init_phone_music_grid(MainActivity.java:100)
在 com.example.j.musicapp.MainActivity.onCreate(MainActivity.java:35)
在 android.app.Activity.performCreate(Activity.java:6904)
在 android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1136)
在 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3266)
在 android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3415)
在 android.app.ActivityThread.access1100 美元（ActivityThread.java:229）
在 android.app.ActivityThread$H.handleMessage(ActivityThread.java:1821)
在 android.os.Handler.dispatchMessage(Handler.java:102)
在 android.os.Looper.loop(Looper.java:148)
在 android.app.ActivityThread.main(ActivityThread.java:7331)
在 java.lang.reflect.Method.invoke（本机方法）
在 com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
在 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
你可以看看这个通用的代码结构，看看是否匹配...我几乎按照它做了，效果很好
if(permissionNotGranted){
requestPermission() ;
}else{
//Permission granted, good to go!
doWhateverWithPermission() ;
}
你很擅长 onRequestPermissionsResult .. 看看结构。希望对您有所帮助！
这是棉花糖及以上版本的示例代码：
public static class Utility {
public static final int MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE = 123;
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
public static boolean checkPermission(final Context context) {
int currentAPIVersion = Build.VERSION.SDK_INT;
if (currentAPIVersion >= android.os.Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(context, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale((Activity) context, Manifest.permission.READ_EXTERNAL_STORAGE)) {
AlertDialog.Builder alertBuilder = new AlertDialog.Builder(context, R.style.MyAlertDialogStyle);
alertBuilder.setCancelable(true);
alertBuilder.setTitle("Permission necessary");
alertBuilder.setMessage("External storage permission is necessary");
alertBuilder.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
public void onClick(DialogInterface dialog, int which) {
ActivityCompat.requestPermissions((Activity) context, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE);
}
});
AlertDialog alert = alertBuilder.create();
alert.show();
} else {
ActivityCompat.requestPermissions((Activity) context, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE);
}
return false;
} else {
return true;
}
} else {
return true;
}
}
}
这是一种检查读取外部存储权限的方法。请参考代码并进行相应操作。
希望这对你有所帮助。
在onCreate方法中也加入这段代码
boolean result = Utility.checkPermission(MainActivity.this);
我正在处理音乐播放器应用程序，所以我必须从存储卡中获取所有歌曲我成功地从存储卡应用程序中获取歌曲并且在 Lollipop 上工作正常。
问题 Marshmallow 运行 时间权限我还添加了 运行 Marshmallow 的时间权限但应用程序仍然崩溃..
这是我的完整代码请告诉我在哪里写运行 Marshmallow 的时间许可。
public class MainActivity extends AppCompatActivity {
private int STORAGE_PERMISSION_CODE = 23;
ListView musiclist;
Cursor musiccursor;
int music_column_index;
int count;
MediaPlayer mMediaPlayer;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init_phone_music_grid();
if(isReadStorageAllowed()){
//If permission is already having then showing the toast
Toast.makeText(MainActivity.this,"You already have the permission",Toast.LENGTH_LONG).show();
//Existing the method with return
return;
}
//If the app has not the permission then asking for the permission
requestStoragePermission();
}
private void requestStoragePermission() {
if (ActivityCompat.shouldShowRequestPermissionRationale(this,Manifest.permission.READ_EXTERNAL_STORAGE)){
//If the user has denied the permission previously your code will come to this block
//Here you can explain why you need this permission
//Explain here why you need this permission
}
//And finally ask for the permission
ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},STORAGE_PERMISSION_CODE);
}
//This method will be called when the user will tap on allow or deny
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
//Checking the request code of our request
if(requestCode == STORAGE_PERMISSION_CODE){
//If permission is granted
if(grantResults.length >0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
//Displaying a toast
Toast.makeText(this,"Permission granted now you can read the storage",Toast.LENGTH_LONG).show();
}else{
//Displaying another toast if permission is not granted
Toast.makeText(this,"Oops you just denied the permission",Toast.LENGTH_LONG).show();
}
}
}
private boolean isReadStorageAllowed() {
int result = ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE);
if (result == PackageManager.PERMISSION_GRANTED)
return true;
return false;
}
private void init_phone_music_grid() {
System.gc();
String[] proj = { MediaStore.Audio.Media._ID,
MediaStore.Audio.Media.DATA,
MediaStore.Audio.Media.DISPLAY_NAME,
MediaStore.Video.Media.SIZE };
musiccursor = managedQuery(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
proj, null, null, null);
count = musiccursor.getCount();
musiclist = (ListView) findViewById(R.id.PhoneMusicList);
musiclist.setAdapter(new MusicAdapter(getApplicationContext()));
musiclist.setOnItemClickListener(musicgridlistener);
mMediaPlayer = new MediaPlayer();
}
private AdapterView.OnItemClickListener musicgridlistener = new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView parent, View v, int position,
long id) {
System.gc();
music_column_index = musiccursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA);
musiccursor.moveToPosition(position);
String filename = musiccursor.getString(music_column_index);
try {
if (mMediaPlayer.isPlaying()) {
mMediaPlayer.reset();
}
mMediaPlayer.setDataSource(filename);
mMediaPlayer.prepare();
mMediaPlayer.start();
} catch (Exception e) {
}
}
};
public class MusicAdapter extends BaseAdapter {
private Context mContext;
public MusicAdapter(Context c) {
mContext = c;
}
public int getCount() {
return count;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
System.gc();
TextView tv = new TextView(mContext.getApplicationContext());
String id = null;
if (convertView == null) {
music_column_index = musiccursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.DISPLAY_NAME);
musiccursor.moveToPosition(position);
id = musiccursor.getString(music_column_index);
music_column_index = musiccursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.SIZE);
musiccursor.moveToPosition(position);
id += " Size(KB):" + musiccursor.getString(music_column_index);
tv.setText(id);
} else
tv.setTextColor(Integer.parseInt(String.valueOf(R.color.colorAccent)));
tv = (TextView) convertView;
return tv;
}
}}
请不要标记重复只需更正我的许可 谢谢
崩溃报告： E/AndroidRuntime：致命异常：main 进程：com.example.j.musicapp，PID：28606 java.lang.RuntimeException：无法启动 activity ComponentInfo{com.example.j.musicapp/com.example.j.musicapp.MainActivity}：java.lang.SecurityException：权限被拒绝：读取 com.android.providers.media.MediaProvider uri 内容：//media/external/audio/media 来自 pid=28606，uid=10161 需要 android.permission.READ_EXTERNAL_STORAGE，或 grantUriPermission() 在 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3319) 在 android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3415) 在 android.app.ActivityThread.access1100 美元（ActivityThread.java:229） 在 android.app.ActivityThread$H.handleMessage(ActivityThread.java:1821) 在 android.os.Handler.dispatchMessage(Handler.java:102) 在 android.os.Looper.loop(Looper.java:148) 在 android.app.ActivityThread.main(ActivityThread.java:7331) 在 java.lang.reflect.Method.invoke（本机方法） 在 com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) 在 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) Caused by: java.lang.SecurityException: Permission Denial: reading com.android.providers.media.MediaProvider uri content://media/external/audio/media from pid=28606, uid=10161 requires android.permission.READ_EXTERNAL_STORAGE, 或者grantUriPermission() 在 android.os.Parcel.readException(Parcel.java:1621) 在 android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:183) 在 android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:135) 在 android.content.ContentProviderProxy.query(ContentProviderNative.java:421) 在 android.content.ContentResolver.query(ContentResolver.java:502) 在 android.content.ContentResolver.query(ContentResolver.java:445) 在 android.app.Activity.managedQuery(Activity.java:2227) 在 com.example.j.musicapp.MainActivity.init_phone_music_grid(MainActivity.java:100) 在 com.example.j.musicapp.MainActivity.onCreate(MainActivity.java:35) 在 android.app.Activity.performCreate(Activity.java:6904) 在 android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1136) 在 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3266) 在 android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3415) 在 android.app.ActivityThread.access1100 美元（ActivityThread.java:229） 在 android.app.ActivityThread$H.handleMessage(ActivityThread.java:1821) 在 android.os.Handler.dispatchMessage(Handler.java:102) 在 android.os.Looper.loop(Looper.java:148) 在 android.app.ActivityThread.main(ActivityThread.java:7331) 在 java.lang.reflect.Method.invoke（本机方法） 在 com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) 在 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
你可以看看这个通用的代码结构，看看是否匹配...我几乎按照它做了，效果很好
if(permissionNotGranted){
requestPermission() ;
}else{
//Permission granted, good to go!
doWhateverWithPermission() ;
}
你很擅长 onRequestPermissionsResult .. 看看结构。希望对您有所帮助！
这是棉花糖及以上版本的示例代码：
public static class Utility {
public static final int MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE = 123;
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
public static boolean checkPermission(final Context context) {
int currentAPIVersion = Build.VERSION.SDK_INT;
if (currentAPIVersion >= android.os.Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(context, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale((Activity) context, Manifest.permission.READ_EXTERNAL_STORAGE)) {
AlertDialog.Builder alertBuilder = new AlertDialog.Builder(context, R.style.MyAlertDialogStyle);
alertBuilder.setCancelable(true);
alertBuilder.setTitle("Permission necessary");
alertBuilder.setMessage("External storage permission is necessary");
alertBuilder.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
public void onClick(DialogInterface dialog, int which) {
ActivityCompat.requestPermissions((Activity) context, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE);
}
});
AlertDialog alert = alertBuilder.create();
alert.show();
} else {
ActivityCompat.requestPermissions((Activity) context, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE);
}
return false;
} else {
return true;
}
} else {
return true;
}
}
}
这是一种检查读取外部存储权限的方法。请参考代码并进行相应操作。 希望这对你有所帮助。
在onCreate方法中也加入这段代码
boolean result = Utility.checkPermission(MainActivity.this);