在Android中编程设置默认拨号应用

<uses-permission android:name="android.permission.WRITE_SETTINGS" />

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.provider.Settings;

public class DefaultDialerReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        if (Intent.ACTION_BOOT_COMPLETED.equals(intent.getAction())) {
            // 设置默认拨号应用
            Intent setDefaultDialerIntent = new Intent(Settings.ACTION_CHANGE_DEFAULT_DIALER);
            setDefaultDialerIntent.putExtra(Settings.EXTRA_DEFAULT_DIALER_PACKAGE_NAME, context.getPackageName());
            context.startActivity(setDefaultDialerIntent);
        }
    }
}

<receiver android:name=".DefaultDialerReceiver">
    <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED" />
    </intent-filter>
</receiver>

import android.Manifest;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;
import android.provider.Settings;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

public class MainActivity extends AppCompatActivity {
    private static final int PERMISSION_REQUEST_CODE = 1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_SETTINGS) != PackageManager.PERMISSION_GRANTED) {
                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_SETTINGS}, PERMISSION_REQUEST_CODE);
            }
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        if (requestCode == PERMISSION_REQUEST_CODE) {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                // 权限已授予，可以进行设置默认拨号应用的操作
                Intent setDefaultDialerIntent = new Intent(Settings.ACTION_CHANGE_DEFAULT_DIALER);
                setDefaultDialerIntent.putExtra(Settings.EXTRA_DEFAULT_DIALER_PACKAGE_NAME, getPackageName());
                startActivity(setDefaultDialerIntent);
            }
        }
    }
}