Android 判断权限&&申请权限

我想初次打开APP就自动弹出是否授权相机摄像机或者电话等等......。反正就是触发Android代码进行授权。

1、判断是否授权

a、PackageManager.PERMISSION_GRANTED获取相机权限代码，自己举一例三。

b、ActivityCompat.checkSelfPermission（this,permission）检查应用是否拥有该权限。（上下文，权限）

c、例：

if (PackageManager.PERMISSION_GRANTED != ActivityCompat.checkSelfPermission(MainActivity.this, android.Manifest.permission.CAMERA)) {
    //判断是否以授权相机权限，没有则授权
    ..........
}

2、申请授权

a、ActivityCompat.requestPermissions(this,permission,请求码)，申请授权。（上下文，权限，请求码）

c、例：

ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.CAMERA},
                WRITE_PERMISSION_REQ_CODE);

3，一次申请多个权限，直接上代码

//Build.VERSION.SDK_INT >= 23
private boolean checkPublishPermission(){
   List<String> permissions = new ArrayList<>();
   if (PackageManager.PERMISSION_GRANTED != ActivityCompat.checkSelfPermission(MainActivity.this, android.Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
       permissions.add(android.Manifest.permission.WRITE_EXTERNAL_STORAGE);
   }  
   if (PackageManager.PERMISSION_GRANTED != ActivityCompat.checkSelfPermission(MainActivity.this, android.Manifest.permission.CAMERA)) {
       permissions.add(android.Manifest.permission.CAMERA);
   }
   if (PackageManager.PERMISSION_GRANTED != ActivityCompat.checkSelfPermission(MainActivity.this, android.Manifest.permission.RECORD_AUDIO)) {
       permissions.add(android.Manifest.permission.RECORD_AUDIO);
   }
   if (PackageManager.PERMISSION_GRANTED != ActivityCompat.checkSelfPermission(MainActivity.this, android.Manifest.permission.READ_PHONE_STATE)) {
       permissions.add(Manifest.permission.READ_PHONE_STATE);
   }
   if (permissions.size() != 0) {
        ActivityCompat.requestPermissions(MainActivity.this,(String[]) permissions.toArray(new String[0]),WRITE_PERMISSION_REQ_CODE);
        return false;
   }
}
checkPublishPermission()

4、实际例子

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