How to enable Android boot

Background: when Android is started, it sends out a system broadcast with the content action_boot_completed.
The constant of the string is Android. Intent. Action. boot_completed. Just "capture" the message in the program and start it again
You can. Remember, the android framework says: Don't call me, I'll call you back. What we need to do is to prepare for receiving this message, and
The implementation method is to implement a broadcastreceiver.

1. Interface Activity, bootstartdemo. Java File

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public class BootStartDemo extends Activity {     /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         // No title         requestWindowFeature(Window.FEATURE_NO_TITLE);         // Full screen         getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,                 WindowManager.LayoutParams.FLAG_FULLSCREEN);         setContentView(R.layout.main);         new Thread() {             public void run() {                 try {                      /* Close the page after 8 seconds */                    sleep(10000);                 } catch (Exception e) {                     e.printStackTrace();                 } finally {                     finish(); // Close the page                }             }         }.start();       } }

This code is very simple. When the activity is started, textview is displayed, and the words you want to display are displayed, and the page disappears after 10 seconds.

2. Receive broadcast messages: bootbroadcastreceiver. Java

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public class BootBroadcastReceiver extends BroadcastReceiver {     static final String action_boot="android.intent.action.BOOT_COMPLETED";        @Override    public void onReceive(Context context, Intent intent) {         if (intent.getAction().equals(action_boot)){              Intent ootStartIntent=new Intent(context,BootStartDemo.class);              ootStartIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);              context.startActivity(ootStartIntent);          }       }   }

This class continues from broadcastreceiver. In the overwriting method onreceive, it detects whether the received intent meets
Boot_completed. If yes, start the activity bootstartdemo.

3. Configuration File

(1) androidmanifest. xml:

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<?xml version="1.0" encoding="utf-8"?> <! -- This is a self-starting program --><manifest xmlns:android="http://schemas.android.com/apk/res/android"      package="com.ajie.bootstartdemo"      android:versionCode="1"      android:versionName="1.0">     <application android:icon="@drawable/icon" android:label="@string/app_name">         <activity android:name=".BootStartDemo"                  android:label="@string/app_name">             <intent-filter>                 <action android:name="android.intent.action.MAIN" />                 <category android:name="android.intent.category.LAUNCHER" />             </intent-filter>         </activity>     <span style="color: rgb(255, 0, 255);"><receiver android:name=".BootBroadcastReceiver">          <intent-filter>          <action android:name="android.intent.action.BOOT_COMPLETED" />          <category android:name="android.intent.category.HOME" />         </intent-filter>      </receiver>  </span>    </application> <span style="color: rgb(255, 0, 255);"><strong><uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"></uses-permission></strong>  </span></manifest>

Note that the node registers a receiver with the system, and the sub-node intent-filter indicates receiving.
Android. Intent. Action. boot_completed message. Configure the permission for Android. Permission. receive_boot_completed.

(2) Layout file, Main. xml

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<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent"          > <TextView    android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:text="@string/boottext"    android:textColor="#5F2DD2"    android:background="#FFFFFF"    android:textSize="60px"     android:gravity="center_horizontal"    /> </LinearLayout>

Compile the APK package and install it to the simulator or mobile phone. Shut down and reboot. The page showing the activity bootstartdemo is displayed.