开发Android 自启动程序

实现原理

Android系统启动时会发送一个ACTION_BOOT_COMPLETED的广播，android.intent.action.BOOT_COMPLETED

代码

新建一个空项目

package com.example.autorun;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;

public class MainActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        TextView tv = new TextView(this);
        tv.setText("Hello Android");
        setContentView(R.layout.activity_main);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

新建一个类，从BroadcastReceiver继承

package com.example.autorun;

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

public class AutoRun extends BroadcastReceiver {
    private final String ACTION = "android.intent.action.BOOT_COMPLETED";

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(ACTION)) ;
        {
            Intent in = new Intent(context, MainActivity.class);
            in.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            //或者用in.setFlags，暂时不知道有什么区别
            context.startActivity(in);

        }

    }
}

配置文件：

 <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"></uses-permission>
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

        <!-- 向系统注册receiver -->
        <receiver android:name="com.example.autorun.AutoRun" >
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" />
            </intent-filter>
        </receiver>
    </application>