blocks|key|582672|text|您可以使用Context.checkCallingorSelfPermission()函数来实现此目的。下面是一个示例：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|582673|private+boolean+checkWriteExternalPermission()
{
++++String+permission+=+android.Manifest.permission.WRITE_EXTERNAL_STORAGE;
++++int+res+=+getContext().checkCallingOrSelfPermission(permission);
++++return+(res+==+PackageManager.PERMISSION_GRANTED);++++++++++++
}|code-block|syntax|javascript|582674|entityMap^0|5|12|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

You can use <code>Context.checkCallingorSelfPermission()</code> function for this. Here is an example:

<pre><code>private boolean checkWriteExternalPermission()
{
 String permission = android.Manifest.permission.WRITE_EXTERNAL_STORAGE;
 int res = getContext().checkCallingOrSelfPermission(permission);
 return (res == PackageManager.PERMISSION_GRANTED); 
}
</code></pre>

blocks|key|582685|text|这也是另一种解决方案。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|582686|PackageManager+pm+=+context.getPackageManager();
int+hasPerm+=+pm.checkPermission(
++++android.Manifest.permission.WRITE_EXTERNAL_STORAGE,+
++++context.getPackageName());
if+(hasPerm+!=+PackageManager.PERMISSION_GRANTED)+{
+++//+do+stuff
}|code-block|syntax|javascript|582687|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This is another solution as well 

<pre><code>PackageManager pm = context.getPackageManager();
int hasPerm = pm.checkPermission(
 android.Manifest.permission.WRITE_EXTERNAL_STORAGE, 
 context.getPackageName());
if (hasPerm != PackageManager.PERMISSION_GRANTED) {
 // do stuff
}
</code></pre>

blocks|key|798716|text|您还可以使用以下命令：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|798717|private+boolean+doesUserHavePermission()
{
++++int+result+=+context.checkCallingOrSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE);
++++return+result+==+PackageManager.PERMISSION_GRANTED;
}|code-block|syntax|javascript|798718|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can also use this:

<pre><code>private boolean doesUserHavePermission()
{
 int result = context.checkCallingOrSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE);
 return result == PackageManager.PERMISSION_GRANTED;
}
</code></pre>

blocks|key|582720|text|比如谷歌documentation：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|582721|//+Assume+thisActivity+is+the+current+activity
int+permissionCheck+=+ContextCompat.checkSelfPermission(thisActivity,+Manifest.permission.WRITE_EXTERNAL_STORAGE);|code-block|syntax|javascript|582722|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/intl/es/training/permissions/requesting.html#perm-check^0|4|D|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

Like Google <a href="http://developer.android.com/intl/es/training/permissions/requesting.html#perm-check">documentation</a>: 

<pre><code>// Assume thisActivity is the current activity
int permissionCheck = ContextCompat.checkSelfPermission(thisActivity, Manifest.permission.WRITE_EXTERNAL_STORAGE);
</code></pre>

blocks|key|798761|text|分享我的方法，以防有人需要它们：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|798762|+/**+Determines+if+the+context+calling+has+the+required+permission
+*+@param+context+-+the+IPC+context
+*+@param+permissions+-+The+permissions+to+check
+*+@return+true+if+the+IPC+has+the+granted+permission
+*/
public+static+boolean+hasPermission(Context+context,+String+permission)+{

++++int+res+=+context.checkCallingOrSelfPermission(permission);

++++Log.v(TAG,+"permission:+"+%2B+permission+%2B+"+=+\t\t"+%2B+
++++(res+==+PackageManager.PERMISSION_GRANTED+?+"GRANTED"+:+"DENIED"));

++++return+res+==+PackageManager.PERMISSION_GRANTED;

}

/**+Determines+if+the+context+calling+has+the+required+permissions
+*+@param+context+-+the+IPC+context
+*+@param+permissions+-+The+permissions+to+check
+*+@return+true+if+the+IPC+has+the+granted+permission
+*/
public+static+boolean+hasPermissions(Context+context,+String...+permissions)+{

++++boolean+hasAllPermissions+=+true;

++++for(String+permission+:+permissions)+{
++++++++//you+can+return+false+instead+of+assigning,+but+by+assigning+you+can+log+all+permission+values
++++++++if+(!+hasPermission(context,+permission))+{hasAllPermissions+=+false;+}
++++}

++++return+hasAllPermissions;

}|code-block|syntax|javascript|798763|并将其称为：|798764|boolean+hasAndroidPermissions+=+SystemUtils.hasPermissions(mContext,+new+String[]+{
++++++++++++++++android.Manifest.permission.ACCESS_WIFI_STATE,
++++++++++++++++android.Manifest.permission.READ_PHONE_STATE,
++++++++++++++++android.Manifest.permission.ACCESS_NETWORK_STATE,
++++++++++++++++android.Manifest.permission.INTERNET,
++++++++});|798765|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Sharing my methods in case someone needs them:

<pre><code> /** Determines if the context calling has the required permission
 * @param context - the IPC context
 * @param permissions - The permissions to check
 * @return true if the IPC has the granted permission
 */
public static boolean hasPermission(Context context, String permission) {

 int res = context.checkCallingOrSelfPermission(permission);

 Log.v(TAG, "permission: " + permission + " = \t\t" + 
 (res == PackageManager.PERMISSION_GRANTED ? "GRANTED" : "DENIED"));

 return res == PackageManager.PERMISSION_GRANTED;

}

/** Determines if the context calling has the required permissions
 * @param context - the IPC context
 * @param permissions - The permissions to check
 * @return true if the IPC has the granted permission
 */
public static boolean hasPermissions(Context context, String... permissions) {

 boolean hasAllPermissions = true;

 for(String permission : permissions) {
 //you can return false instead of assigning, but by assigning you can log all permission values
 if (! hasPermission(context, permission)) {hasAllPermissions = false; }
 }

 return hasAllPermissions;

}
</code></pre>

And to call it:

<pre><code>boolean hasAndroidPermissions = SystemUtils.hasPermissions(mContext, new String[] {
 android.Manifest.permission.ACCESS_WIFI_STATE,
 android.Manifest.permission.READ_PHONE_STATE,
 android.Manifest.permission.ACCESS_NETWORK_STATE,
 android.Manifest.permission.INTERNET,
 });
</code></pre>

blocks|key|798890|text|您应该通过以下方式检查权限(如此处Android+permissions所述)：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|798891|int+result+=+ContextCompat.checkSelfPermission(getContext(),+Manifest.permission.READ_PHONE_STATE);|code-block|syntax|javascript|798892|然后，将您的结果与以下任一项进行比较：|798893|result+==+PackageManager.PERMISSION_DENIED|798894|或者：|798895|result+==+PackageManager.PERMISSION_GRANTED|798896|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.android.com/training/permissions/requesting.html^0|H|J|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@$A|Z|B|10|1|11]]|C|$]]|$1|D|3|E|5|F|7|12|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|13|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|14|8|@]|9|@]|C|$G|H]]|$1|M|3|N|5|6|7|15|8|@]|9|@]|C|$]]|$1|O|3|P|5|F|7|16|8|@]|9|@]|C|$G|H]]|$1|Q|3|-4|5|6|7|17|8|@]|9|@]|C|$]]]|R|$S|$5|T|U|V|C|$W|X]]]]

You should check for permissions in the following way (as described here <a href="https://developer.android.com/training/permissions/requesting.html" rel="noreferrer">Android permissions</a>):

<pre><code>int result = ContextCompat.checkSelfPermission(getContext(), Manifest.permission.READ_PHONE_STATE);
</code></pre>

then, compare your result to either:

<pre><code>result == PackageManager.PERMISSION_DENIED
</code></pre>

or:

<pre><code>result == PackageManager.PERMISSION_GRANTED
</code></pre>

blocks|key|582795|text|适合我的代码是:-|type|unstyled|depth|inlineStyleRanges|entityRanges|data|582796|++final+int+MY_PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE+=+102;
++if+((ContextCompat.checkSelfPermission(getActivity(),Manifest.permission.WRITE_EXTERNAL_STORAGE)+!=+PackageManager.PERMISSION_GRANTED))+{

++++++++++++++++requestPermissions(new+String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
++++++++++++++++++++++++MY_PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE);
++++++++++++}+else+{
++++++++//+user+already+provided+permission
++++++++++++++++//+perform+function+for+what+you+want+to+achieve
+++++}

@Override
public+void+onRequestPermissionsResult(int+requestCode,+String[]+permissions,+int[]+grantResults)+{

++++boolean+canUseExternalStorage+=+false;

++++switch+(requestCode)+{
++++++++case+MY_PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE:+{
++++++++++++if+(grantResults.length+>+0
++++++++++++++++++++&&+grantResults[0]+==+PackageManager.PERMISSION_GRANTED)+{
++++++++++++++++canUseExternalStorage+=+true;
++++++++++++}

++++++++++++if+(!canUseExternalStorage)+{
++++++++++++++++Toast.makeText(getActivity(),+"Cannot+use+this+feature+without+requested+permission",+Toast.LENGTH_SHORT).show();
++++++++++++}+else+{
++++++++++++++++//+user+now+provided+permission
++++++++++++++++//+perform+function+for+what+you+want+to+achieve
++++++++++++}
++++++++}
++++++}
+}|code-block|syntax|javascript|582797|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

The code which works fine for me is :-

<pre><code> final int MY_PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE = 102;
 if ((ContextCompat.checkSelfPermission(getActivity(),Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED)) {

 requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
 MY_PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE);
 } else {
 // user already provided permission
 // perform function for what you want to achieve
 }

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {

 boolean canUseExternalStorage = false;

 switch (requestCode) {
 case MY_PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE: {
 if (grantResults.length &gt; 0
 &amp;&amp; grantResults[0] == PackageManager.PERMISSION_GRANTED) {
 canUseExternalStorage = true;
 }

 if (!canUseExternalStorage) {
 Toast.makeText(getActivity(), "Cannot use this feature without requested permission", Toast.LENGTH_SHORT).show();
 } else {
 // user now provided permission
 // perform function for what you want to achieve
 }
 }
 }
 }
</code></pre>

blocks|key|582854|text|if+((ContextCompat.checkSelfPermission(MainActivity.this,+Manifest.permission.READ_EXTERNAL_STORAGE)+!=+PackageManager.PERMISSION_GRANTED)+&&+(ContextCompat.checkSelfPermission(MainActivity.this,+Manifest.permission.WRITE_EXTERNAL_STORAGE)+!=+PackageManager.PERMISSION_GRANTED)+&&+(ContextCompat.checkSelfPermission(MainActivity.this,+Manifest.permission.CAMERA)+!=+PackageManager.PERMISSION_GRANTED))+{

++++if+(Build.VERSION.SDK_INT+>=+Build.VERSION_CODES.M)+{

++++++++requestPermissions(new+String[]{Manifest.permission.READ_EXTERNAL_STORAGE,+Manifest.permission.WRITE_EXTERNAL_STORAGE,+Manifest.permission.CAMERA},
++++++++++++++++MY_PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE);
++++}
}+|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|582855|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>if ((ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) &amp;&amp; (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) &amp;&amp; (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED)) {

 if (Build.VERSION.SDK_INT &gt;= Build.VERSION_CODES.M) {

 requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.CAMERA},
 MY_PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE);
 }
} 
</code></pre>

blocks|key|582911|text|检查KOTLIN中的权限(RunTime)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|582912|在清单中：(android.permission.WRITE_EXTERNAL_STORAGE)|582913|++++fun+checkPermissions(){

++++++var+permission_array=arrayOf(android.Manifest.permission.WRITE_EXTERNAL_STORAGE)
++++++if((ContextCompat.checkSelfPermission(this,permission_array[0]))==PackageManager.PERMI+++SSION_DENIED){
++++++++requestPermissions(permission_array,0)
++++++}
++++}

++++override+fun+onRequestPermissionsResult(requestCode:+Int,+permissions:+Array<out+String>,+grantResults:+IntArray)+{
++++++++super.onRequestPermissionsResult(requestCode,+permissions,+grantResults)

++++++++++if(requestCode==0+&&+grantResults[0]==PackageManager.PERMISSION_GRANTED){

+++++++//Do+Your+Operations+Here

++++++++---------->
+++++++++//


++++++++++}
++++}|code-block|syntax|javascript|582914|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Check Permissions In KOTLIN (RunTime)

In Manifest: (android.permission.WRITE_EXTERNAL_STORAGE)

<pre><code> fun checkPermissions(){

 var permission_array=arrayOf(android.Manifest.permission.WRITE_EXTERNAL_STORAGE)
 if((ContextCompat.checkSelfPermission(this,permission_array[0]))==PackageManager.PERMI SSION_DENIED){
 requestPermissions(permission_array,0)
 }
 }

 override fun onRequestPermissionsResult(requestCode: Int, permissions: Array&lt;out String&gt;, grantResults: IntArray) {
 super.onRequestPermissionsResult(requestCode, permissions, grantResults)

 if(requestCode==0 &amp;&amp; grantResults[0]==PackageManager.PERMISSION_GRANTED){

 //Do Your Operations Here

 ----------&gt;
 //


 }
 }
</code></pre>

I design a function that may get/set a resource from SD and if not found from sd then take it from Asset and if possible write the asset back to SD 
This function may check by method invocation if SD is mounted and accessible...

<pre><code>boolean bSDisAvalaible = Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);
</code></pre>

My designed function may be used from one app(project) to another (with or without android.permission.WRITE_EXTERNAL_STORAGE)

Then I would like to check if the current application has this particular permission without playing with SecurityException.

Does it exist a "nice" way to consult current defined permissions at runtime ?

How permission can be checked at runtime without throwing SecurityException?

我设计了一个函数，可以从SD获取/设置资源，如果从sd找不到资源，则从Asset获取资源，如果可能，将资产写回SD此函数可以通过方法调用检查SD是否已安装并可访问...boolean bSDisAvalaible = Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);我设计的函数可以从一个应用程序(项目)

问如何在不抛出SecurityException的情况下在运行时检查权限？
EN

回答 9

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问如何在不抛出SecurityException的情况下在运行时检查权限？EN

回答 9

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问如何在不抛出SecurityException的情况下在运行时检查权限？
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