在Android中的一个应用程序会话中获取位置和外部存储权限

Question

我正在向我的应用程序添加Location和ExternalWrite权限。我希望用户能够在一个应用程序会话中获得这两种权限。当前，必须关闭并重新打开应用程序才能显示外部写入权限请求对话框。

MainActivity中的代码如下，

public boolean checkExternalWritePermission() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
new AlertDialog.Builder(this)
.setTitle(R.string.title_externalwrite_permission)
.setMessage(R.string.text_externalwrite_permission)
.setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
//Prompt the user once explanation has been shown
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, MY_PERMISSIONS_REQUEST_EXTERNAL_WRITE);
}
})
.create()
.show();
} else {
ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},MY_PERMISSIONS_REQUEST_EXTERNAL_WRITE);
}
return false;
} else {
return true;
}
}

和

public boolean checkLocationPermission() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.ACCESS_FINE_LOCATION)) {
new AlertDialog.Builder(this)
.setTitle(R.string.title_location_permission)
.setMessage(R.string.text_location_permission)
.setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, MY_PERMISSIONS_REQUEST_LOCATION);
}
})
.create()
.show();
} else {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, MY_PERMISSIONS_REQUEST_LOCATION);
}
return false;
} else {
return true;
}
}

然而，从OnCreate、调用这些

@Override
protected void onCreate(Bundle savedInstanceState) {
...
checkLocationPermission();
checkExternalWritePermission()  
}

在新安装(或权限重置(后，只调用OnCreate中的第一个函数。如果应用程序未关闭并重新启动，则不会调用第二个问题：如何在一个应用程序会话中同时授予两个权限？提前谢谢。

Answer 1

这很有效。

private boolean requestPermissions() {
int iExtStorage = ContextCompat.checkSelfPermission(this, android.Manifest.permission.WRITE_EXTERNAL_STORAGE);
int iCoarseLocation = ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION);
int iFineLocation = ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION);
List<String> listPermissionsNeeded = new ArrayList<>();
if (iExtStorage != PackageManager.PERMISSION_GRANTED) {
listPermissionsNeeded.add(android.Manifest.permission.WRITE_EXTERNAL_STORAGE);
}
if (iFineLocation != PackageManager.PERMISSION_GRANTED) {
listPermissionsNeeded.add(android.Manifest.permission.ACCESS_FINE_LOCATION);
}
if (iCoarseLocation != PackageManager.PERMISSION_GRANTED) {
listPermissionsNeeded.add(android.Manifest.permission.ACCESS_COARSE_LOCATION);
}
if (!listPermissionsNeeded.isEmpty())
{
ActivityCompat.requestPermissions(this,listPermissionsNeeded.toArray
(new String[listPermissionsNeeded.size()]),REQUEST_ID_MULTIPLE_PERMISSIONS);
return false;
}
return true;
}