权限

权限

• activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    xmlns:android="http://schemas.android.com/apk/res/android">

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="打电话"
        android:id="@+id/btn_call"/>

</LinearLayout>

• 注册权限

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

• MainActivity.java

package com.example.myruntimepermission;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

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

        findViewById(R.id.btn_call).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                // 安卓6.0及以上要运行时申请权限
                if (ContextCompat.checkSelfPermission(MainActivity.this,
                        Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
                    // 如果没有授权则申请授权，参数3是请求码
                    ActivityCompat.requestPermissions(MainActivity.this,
                            new String[]{Manifest.permission.CALL_PHONE}, 1);
                } else {
                    call();
                }
            }
        });
    }

    private void call() {
        try {
            // 隐式Intent
            Intent intent = new Intent(Intent.ACTION_CALL);
            intent.setData(Uri.parse("tel:10086"));
            startActivity(intent);
        } catch (SecurityException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        // 判断授权结果
        switch (requestCode){
            case 1:
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
                    call();
                }else{
                    Toast.makeText(this, "已拒绝权限", Toast.LENGTH_SHORT).show();
                }
                break;
            default:
        }
    }
}