Android 实现拨打电话功能

Android 实现拨打电话功能；

首先会检测应用是否拥有拨打电话的权限，会动态申请；

从页面输入手机号码后，点击按钮就会调用系统的拨号功能；

也可以设置为默认的电话号码，作为客服联系方式。

MakeCallActivity.Java

java 复制代码

import android.Manifest;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

public class MakeCallActivity extends Activity implements View.OnClickListener {
    Button btn_make_call;
    EditText phoneNumber;
    private static final int REQUEST_PHONE_CALL = 1;


    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_make_call);
        phoneNumber = (EditText) findViewById(R.id.phoneNumber);
        btn_make_call = findViewById(R.id.btn_make_call);
        btn_make_call.setOnClickListener(this);
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        Log.e("permission", requestCode + "");
        switch (requestCode) {
            case 1:
                if (requestCode == REQUEST_PHONE_CALL) {
                    if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                        call(phoneNumber.getText().toString()); // 使用已授权的电话号码
                    } else {
                        Toast.makeText(this, "电话权限被拒绝", Toast.LENGTH_SHORT).show();
                    }
                }
                break;
            default:
                Toast.makeText(this, "wait", Toast.LENGTH_LONG).show();
        }

    }

    @Override
    public void onClick(View v) {
        int id = v.getId();
        if (id == R.id.btn_make_call) {
            if (ContextCompat.checkSelfPermission(MakeCallActivity.this, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
                ActivityCompat.requestPermissions(MakeCallActivity.this, new String[]{Manifest.permission.CALL_PHONE}, 1);
                call(phoneNumber.getText().toString());
                Log.e("permission", "requestPermissions");
            } else {
                call(phoneNumber.getText().toString());
                Log.e("permission", "checkSelfPermission");
            }

        }

    }


    private void call(String phone) {
        try {
            Intent intent = new Intent(Intent.ACTION_CALL);
            intent.setData(Uri.parse("tel:" + phone));
            if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CALL_PHONE) == PackageManager.PERMISSION_GRANTED) {
                startActivity(intent);
            }
        } catch (SecurityException e) {
            e.printStackTrace();
        }
    }
}

activity_make_call.xml

xml 复制代码

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:orientation="vertical"
    android:layout_height="match_parent">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="电话号码:"/>
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="请输入电话号码"
            android:id="@+id/phoneNumber"
            />
    </LinearLayout>
    <Button
        android:id="@+id/btn_make_call"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/make_call" />
</LinearLayout>

AndroidManifest.xml

xml 复制代码

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">

    <uses-feature
        android:name="android.hardware.telephony"
        android:required="true" />
    <uses-permission android:name="android.permission.CALL_PHONE" />


    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/make_call"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.Learn">
        <activity
            android:name=".MakeCallActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>