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我正在致電一個通話應用程序，需要請求CALL_PHONE權限，當我嘗試開始通話活動startActivity(callIntent);時，它給出了一個錯誤，並說我需要設置一個權限檢查器，給了我一個錯誤的this聲明說，Android權限檢查器語法錯誤
Wrong 1st Argument type.Found:'android.view.View.OnClickListener',required:'android.context.Context'
所以我的繼承人我的主要活動，如果你能皮斯幫我糾正它
package com.android.beez.emergencyng;
import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button alert = (Button) findViewById(R.id.alert);
alert.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent callIntent = new Intent(Intent.ACTION_CALL);
callIntent.setData(Uri.parse("tel:123"));
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
startActivity(callIntent);
}
});
}
}