安卓开发之开机启动

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.lidaochen.test001">
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

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

</manifest>

package com.lidaochen.test001;

import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.os.SystemClock;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    // 下面的这个方法是屏蔽掉了程序的后退键
    @Override
    public void onBackPressed() {
    }

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

package com.lidaochen.test001;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

public class BootReceiver extends BroadcastReceiver {
    // 当手机重新启动的时候调用
    @Override
    public void onReceive(Context context, Intent intent) {
        Log.e("boot", "进来了！");
        // 在这个方法里面开启Activity
        Intent intent1 = new Intent(context, MainActivity.class);
        // 注意不能在广播接收者里面直接开启Activity，需要添加一个任务栈的标记，
        intent1.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        // 开启Activity
        context.startActivity(intent1);
    }
}