解决android4.4中 Permission Denial: not allowed to send broadcast android.intent.action.MEDIA_MOUNTED
2016-06-22 15:49
921 查看
在最近自己写的一个项目中, 遇到了这样一个问题,扫描系统SD卡中的图片文件,并按照时间进行排序,通常就是发送一个特定的广播Intent.ACTION_MEDIA_MOUNTED来通知系统执行扫描,例如
[java] view
plain copy
![](https://oscdn.geek-share.com/Uploads/Images/Content/201611/a7c8e286f463007e2a900848b93dd72c.png)
![](https://oscdn.geek-share.com/Uploads/Images/Content/201611/9e12f1d3e499fc949c886e7c9e0484f9)
mContext.sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, <span style="font-family: Arial, Helvetica, sans-serif;">Uri.parse("file://" + Environment.getExternalStorageDirectory())));</span>
这样子,就可以满足要求了, 可是最近把手机升级到了4.4.4后发现,这个方法不好使了,一执行就报错
,错误如下
[java] view
plain copy
![](https://oscdn.geek-share.com/Uploads/Images/Content/201611/a7c8e286f463007e2a900848b93dd72c.png)
![](https://oscdn.geek-share.com/Uploads/Images/Content/201611/9e12f1d3e499fc949c886e7c9e0484f9)
07-08 13:34:24.211: W/System.err(23751): Caused by: java.lang.SecurityException: Permission Denial: not allowed to send broadcast <a href="http://lib.csdn.net/base/15" class="replace_word" title="undefined" target="_blank" style="color:#df3434; font-weight:bold;">android</a>.intent.action.MEDIA_MOUNTED from pid=23751, uid=10246
意思是没有权限发送这样的一条广播了,后来在stackoverflow中查找,发现在4.4[KK]后Intent.ACTION_MEDIA_MOUNTED这条Intent广播是受保护的,意思是只有系统应用才有权限使用广播通知系统扫描SD卡
[java] view
plain copy
![](https://oscdn.geek-share.com/Uploads/Images/Content/201611/a7c8e286f463007e2a900848b93dd72c.png)
![](https://oscdn.geek-share.com/Uploads/Images/Content/201611/9e12f1d3e499fc949c886e7c9e0484f9)
<protected-broadcast android:name="android.intent.action.MEDIA_MOUNTED" />
下面给出我的解决方法:
4.4
之前:
[java] view
plain copy
![](https://oscdn.geek-share.com/Uploads/Images/Content/201611/a7c8e286f463007e2a900848b93dd72c.png)
![](https://oscdn.geek-share.com/Uploads/Images/Content/201611/9e12f1d3e499fc949c886e7c9e0484f9)
private LinkedList<PictureItem> getPictureBeforeKK()
{
LinkedList<PictureItem> items = null;
mContext.sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://" + Environment.getExternalStorageDirectory())));
Uri mImageUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
ContentResolver mContentResolver = mContext.getContentResolver();
Cursor mCursor = mContentResolver.query(mImageUri, null, null, null, MediaStore.Images.Media.DATE_ADDED);
if (mCursor != null && mCursor.getCount() > 0)
{
items = new LinkedList<PictureItem>();
mCursor.moveToFirst();
while (mCursor.moveToNext())
{
// 获取图片的路径
String path = mCursor.getString(mCursor.getColumnIndex(MediaStore.Images.Media.DATA));
// 获取图片的添加到系统的毫秒数
long time = mCursor.getLong(mCursor.getColumnIndex(MediaStore.Images.Media.DATE_ADDED));
PictureItem item = new PictureItem(path, parseTimeToYMD(time));
System.out.println("item = " + item);
items.add(item);
}
mCursor.close();
}
return items;
}
4.4
[java] view
plain copy
![](https://oscdn.geek-share.com/Uploads/Images/Content/201611/a7c8e286f463007e2a900848b93dd72c.png)
![](https://oscdn.geek-share.com/Uploads/Images/Content/201611/9e12f1d3e499fc949c886e7c9e0484f9)
private LinkedList<PictureItem> getPictureInKK()
{
LinkedList<PictureItem> items = null;
mContext.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file://" + Environment.getExternalStorageDirectory())));
Uri mImageUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
ContentResolver mContentResolver = mContext.getContentResolver();
Cursor mCursor = mContentResolver.query(mImageUri, null, null, null, MediaStore.Images.Media.DATE_ADDED);
if (mCursor != null && mCursor.getCount() > 0)
{
items = new LinkedList<PictureItem>();
mCursor.moveToFirst();
while (mCursor.moveToNext())
{
// 获取图片的路径
String path = mCursor.getString(mCursor.getColumnIndex(MediaStore.Images.Media.DATA));
// 获取图片的添加到系统的毫秒数
long time = mCursor.getLong(mCursor.getColumnIndex(MediaStore.Images.Media.DATE_ADDED));
PictureItem item = new PictureItem(path, parseTimeToYMD(time));
System.out.println("item = " + item);
items.add(item);
}
mCursor.close();
}
return items;
}
[java] view
plain copy
![](https://oscdn.geek-share.com/Uploads/Images/Content/201611/a7c8e286f463007e2a900848b93dd72c.png)
![](https://oscdn.geek-share.com/Uploads/Images/Content/201611/9e12f1d3e499fc949c886e7c9e0484f9)
public String parseTimeToYMD(long time)
{
System.setProperty("user.timezone", "Asia/Shanghai");
TimeZone tz = TimeZone.getTimeZone("Asia/Shanghai");
TimeZone.setDefault(tz);
SimpleDateFormat format = new SimpleDateFormat("yyyy年MM月dd日");
return format.format(new Date(time * 1000L));
}
注意加入相应的访问权限!
[java] view
plain copy
![](https://oscdn.geek-share.com/Uploads/Images/Content/201611/a7c8e286f463007e2a900848b93dd72c.png)
mContext.sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, <span style="font-family: Arial, Helvetica, sans-serif;">Uri.parse("file://" + Environment.getExternalStorageDirectory())));</span>
这样子,就可以满足要求了, 可是最近把手机升级到了4.4.4后发现,这个方法不好使了,一执行就报错
,错误如下
[java] view
plain copy
![](https://oscdn.geek-share.com/Uploads/Images/Content/201611/a7c8e286f463007e2a900848b93dd72c.png)
07-08 13:34:24.211: W/System.err(23751): Caused by: java.lang.SecurityException: Permission Denial: not allowed to send broadcast <a href="http://lib.csdn.net/base/15" class="replace_word" title="undefined" target="_blank" style="color:#df3434; font-weight:bold;">android</a>.intent.action.MEDIA_MOUNTED from pid=23751, uid=10246
意思是没有权限发送这样的一条广播了,后来在stackoverflow中查找,发现在4.4[KK]后Intent.ACTION_MEDIA_MOUNTED这条Intent广播是受保护的,意思是只有系统应用才有权限使用广播通知系统扫描SD卡
[java] view
plain copy
![](https://oscdn.geek-share.com/Uploads/Images/Content/201611/a7c8e286f463007e2a900848b93dd72c.png)
<protected-broadcast android:name="android.intent.action.MEDIA_MOUNTED" />
下面给出我的解决方法:
4.4
之前:
[java] view
plain copy
![](https://oscdn.geek-share.com/Uploads/Images/Content/201611/a7c8e286f463007e2a900848b93dd72c.png)
private LinkedList<PictureItem> getPictureBeforeKK()
{
LinkedList<PictureItem> items = null;
mContext.sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://" + Environment.getExternalStorageDirectory())));
Uri mImageUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
ContentResolver mContentResolver = mContext.getContentResolver();
Cursor mCursor = mContentResolver.query(mImageUri, null, null, null, MediaStore.Images.Media.DATE_ADDED);
if (mCursor != null && mCursor.getCount() > 0)
{
items = new LinkedList<PictureItem>();
mCursor.moveToFirst();
while (mCursor.moveToNext())
{
// 获取图片的路径
String path = mCursor.getString(mCursor.getColumnIndex(MediaStore.Images.Media.DATA));
// 获取图片的添加到系统的毫秒数
long time = mCursor.getLong(mCursor.getColumnIndex(MediaStore.Images.Media.DATE_ADDED));
PictureItem item = new PictureItem(path, parseTimeToYMD(time));
System.out.println("item = " + item);
items.add(item);
}
mCursor.close();
}
return items;
}
4.4
[java] view
plain copy
![](https://oscdn.geek-share.com/Uploads/Images/Content/201611/a7c8e286f463007e2a900848b93dd72c.png)
private LinkedList<PictureItem> getPictureInKK()
{
LinkedList<PictureItem> items = null;
mContext.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file://" + Environment.getExternalStorageDirectory())));
Uri mImageUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
ContentResolver mContentResolver = mContext.getContentResolver();
Cursor mCursor = mContentResolver.query(mImageUri, null, null, null, MediaStore.Images.Media.DATE_ADDED);
if (mCursor != null && mCursor.getCount() > 0)
{
items = new LinkedList<PictureItem>();
mCursor.moveToFirst();
while (mCursor.moveToNext())
{
// 获取图片的路径
String path = mCursor.getString(mCursor.getColumnIndex(MediaStore.Images.Media.DATA));
// 获取图片的添加到系统的毫秒数
long time = mCursor.getLong(mCursor.getColumnIndex(MediaStore.Images.Media.DATE_ADDED));
PictureItem item = new PictureItem(path, parseTimeToYMD(time));
System.out.println("item = " + item);
items.add(item);
}
mCursor.close();
}
return items;
}
[java] view
plain copy
![](https://oscdn.geek-share.com/Uploads/Images/Content/201611/a7c8e286f463007e2a900848b93dd72c.png)
public String parseTimeToYMD(long time)
{
System.setProperty("user.timezone", "Asia/Shanghai");
TimeZone tz = TimeZone.getTimeZone("Asia/Shanghai");
TimeZone.setDefault(tz);
SimpleDateFormat format = new SimpleDateFormat("yyyy年MM月dd日");
return format.format(new Date(time * 1000L));
}
注意加入相应的访问权限!
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