我尝试检查单击按钮时的权限,它总是为我提供 -1
这是我的AndroidManifest
文件:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.natalia.assignment_2">
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
我也有compileSdkVersion
28,minSdkVersion
22和targetSdkVersion
28。
在我的MainActivity
中,我尝试检查权限,但它始终被拒绝,因为它返回 -1
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button buttonLocate = (Button) findViewById(R.id.buttonLocate);
buttonLocate.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
askForPermission("android.permission.ACCESS_FINE_LOCATION");
});
}
private void askForPermission(String permission) {
if(MainActivity.this != null) {
if (PermissionChecker.checkSelfPermission(MainActivity.this, permission) != PackageManager.PERMISSION_GRANTED) {
// IT ALWAYS COMES TO THIS IF AND SHOWS -1
Toast.makeText(this, "" + String.valueOf(PermissionChecker.checkSelfPermission(MainActivity.this, permission)), Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "" + permission + " is already granted.", Toast.LENGTH_SHORT).show();
}
}
}
}
我尝试了很多小时,但是没有帮助...这里可能有什么问题?
答案 0 :(得分:0)
askForPermission(“ android.permission.ACCESS_FINE_LOCATION”);
这就是传递给方法时的结果。 尝试做:
askForPermission("Manifest.permission.ACCESS_FINE_LOCATION");
这可能有效。如果没有,我检查了其他一些文章,到处都是,它不是作为字符串传递的。
尝试在不使用字符串的情况下使用它:
(PermissionChecker.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_FINE_LOCATION)
希望它能起作用!