拨打电话的实现

import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;

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 v) {
                // 创建意图对象
                Intent intent = new Intent();
                // 设置动作
                intent.setAction(intent.ACTION_CALL);
                // 设置数据
                Uri data = Uri.parse("tel://10086");
                intent.setData(data);
                // 激活动作
                startActivity(intent);
            }
        });
        findViewById(R.id.btn_call2).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel://10086"));
                startActivity(intent);
            }
        });
    }


}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.loaderman.breakpointdemo.MainActivity">

    <Button
        android:id="@+id/btn_call"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="直接拨打电话"/>
    <Button
        android:id="@+id/btn_call2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="跳转拨打界面拨打电话"/>
</LinearLayout>

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