Android权限:在用户按下“后执行任务”;允许;
我想知道,当用户按下“允许”按钮访问联系人详细信息/日历访问等时,我们是否有办法识别事件Android权限:在用户按下“后执行任务”;允许;,android,android-permissions,Android,Android Permissions,我想知道,当用户按下“允许”按钮访问联系人详细信息/日历访问等时,我们是否有办法识别事件 我知道有一种方法可以通过ActivityCompat.requestPermissions请求权限,但有没有一种方法可以在用户授予权限后立即执行操作?调用requestPermissions()请求权限。您可以在onRequestPermissionsResult()中找到结果,并可以确定他们是否授予了该权限。从应用程序代码的角度来看,这是“紧接着”。首先定义变量: public static int MY
我知道有一种方法可以通过ActivityCompat.requestPermissions请求权限,但有没有一种方法可以在用户授予权限后立即执行操作?调用
requestPermissions()
请求权限。您可以在onRequestPermissionsResult()中找到结果,并可以确定他们是否授予了该权限。从应用程序代码的角度来看,这是“紧接着”。首先定义变量:
public static int MY_PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION = 1;
使用以下命令请求权限:
if (ActivityCompat.checkSelfPermission(this,
android.Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
android.Manifest.permission.ACCESS_FINE_LOCATION)) {
// Show an explanation to the user *asynchronously* -- don't block
// this thread waiting for the user's response! After the user
// sees the explanation, try again to request the permission.
} else {
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, MY_PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION);
// MY_PERMISSIONS_REQUEST_READ_CONTACTS is an
// app-defined int constant. The callback method gets the
// result of the request.
}
}
现在使用以下方法获取结果:
@Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION : {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay! Do the
// contacts-related task you need to do.
Toast.makeText(getApplicationContext(), "Permission granted", Toast.LENGTH_SHORT).show();
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
Toast.makeText(getApplicationContext(), "Permission denied", Toast.LENGTH_SHORT).show();
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
用于片段
如果在片段中尝试此代码,请更改
checkSelfPermission()
到
ActivityCompact.checkSelfPermission()
也会改变
ActivityCompat.requestPermissions()
到
requestPermissions()
权限结果(允许或拒绝)的处理与活动相同
有关更完整的示例,请参见此我使用此代码就是为了这个目的
public boolean isPermissionGranted() {
if (Build.VERSION.SDK_INT >= 23) {
if (checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE)
== PackageManager.PERMISSION_GRANTED && checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE)
== PackageManager.PERMISSION_GRANTED && checkSelfPermission(Manifest.permission.CAMERA)
== PackageManager.PERMISSION_GRANTED) {
Log.v(TAG, "Permission is granted");
return true;
} else {
ActivityCompat.requestPermissions(this, new String[]{
Manifest.permission.CAMERA
}, 1);
return false;
}
} else { //permission is automatically granted on sdk<23 upon installation
Log.v(TAG, "Permission is granted");
return true;
}
}
对回调函数onRequestPermissionsResult(..)
它返回提示结果,可用于执行任何进一步的代码。谢谢@rafsanahmad007这是我正在寻找的卸载和清理构建apk…确保在清单中添加权限…对于低于marsmallow的android版本,权限对话框将不会显示。如果grantResults[0]已经==PackageManager.PERMISSION_grantResults.length>0,显然,条件验证不是多余的吗?ActivityCompact应该是ActivityCompat。它只有1个字符,所以我无法提交编辑。它正在不断地破坏我的应用程序
if(isPermissionGranted())
{
// do your stuff
}