如何在每次手机关闭时重新启动服务，然后重新开启，（如果电池电量耗尽，或者用户重新启动）
有一种简单的方法吗？
这是我的服务＆gt;
package com.greenroad.candidate.mywallpaperchanger;
import android.app.Service;
import android.app.WallpaperManager;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Handler;
import android.os.IBinder;
import android.preference.PreferenceManager;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.Display;
import android.view.WindowManager;
import android.widget.Toast;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Random;
import java.util.Timer;
import java.util.TimerTask;
/**
* Created by pitsponet on 31/08/2015.
*/
public class myService extends Service {
int oneSecond = 1000;
int oneMinute = oneSecond*60;
int oneHour = oneMinute*60;
int pictureNumberToChoos = 0;
boolean isTimerRunning = false;
int timerDeley = oneHour;
private Timer timer;
private TimerTask timerTask = new TimerTask() {
@Override
public void run() {
//this timer will run again in 10 seconds
Log.d("MyLog", "timer entered ");
//shows a toast saying timer has entered
Handler mainHandler = new Handler(getApplicationContext().getMainLooper());
mainHandler.post(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(), "timer listener Entered", Toast.LENGTH_LONG).show();
}
});
//takes picture modifier and updates it to +1 then stores it at var > pictureModifireInt
// Access the default SharedPreferences
SharedPreferences pref = getApplicationContext().getSharedPreferences("myGlobalPrefTable", MODE_PRIVATE);
SharedPreferences.Editor editor = pref.edit();
//open a boolean to tell if the service is activated for the first time it will say false
Integer pictureModifireInt = pref.getInt("pictureModifire", 0);
pictureModifireInt++;
/////holds a list with all the images
int displayPicture = R.drawable.captain;
ArrayList<Integer> pictureNames = new ArrayList<>();
pictureNames.add(R.drawable.captain);
pictureNames.add(R.drawable.flash);
pictureNames.add(R.drawable.superman);
pictureNames.add(R.drawable.thor);
pictureNames.add(R.drawable.wonder);
pictureNames.add(R.drawable.a);
pictureNames.add(R.drawable.b);
pictureNames.add(R.drawable.c);
pictureNames.add(R.drawable.d);
pictureNames.add(R.drawable.e);
pictureNames.add(R.drawable.f);
pictureNames.add(R.drawable.g);
pictureNames.add(R.drawable.h);
pictureNames.add(R.drawable.i);
pictureNames.add(R.drawable.j);
pictureNames.add(R.drawable.k);
pictureNames.add(R.drawable.l);
pictureNames.add(R.drawable.m);
pictureNames.add(R.drawable.n);
pictureNames.add(R.drawable.o);
//logs the stored prefrence and select the correct image at place > picture modifire
Log.d("myLog", "storedPreference: " + pictureModifireInt);
displayPicture = pictureNames.get(pictureModifireInt-1);
if(pictureModifireInt > 19){
// Edit the saved preferences
Log.d("myLog", "putting in pictureModifire : : " + 0);
editor.putInt("pictureModifire", 0); // getting String
editor.commit();
} else {
Log.d("myLog", "putting in pictureModifire : : " + pictureModifireInt);
editor.putInt("pictureModifire", pictureModifireInt); // getting String
editor.commit();
}
///////////////////////////start of wallpaper implemintation
WindowManager wm= (WindowManager) getSystemService(MainActivity.WINDOW_SERVICE);
Display display = wm.getDefaultDisplay();
int width = display.getWidth();
int height = display.getHeight();
Bitmap bmap2 = BitmapFactory.decodeResource(getResources(), displayPicture);
Bitmap bitmap = Bitmap.createScaledBitmap(bmap2, width, height, true);
WallpaperManager wallpaperManager = WallpaperManager.getInstance(getApplicationContext());
try {
wallpaperManager.setBitmap(bitmap);
} catch (IOException e) {
e.printStackTrace();
}
//////////////////////////end of wallpaper implementation
mainHandler = new Handler(getApplicationContext().getMainLooper());
final Integer finalPictureModifireInt = pictureModifireInt-1;
mainHandler.post(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(), "wallpaper changed to : "+ finalPictureModifireInt+" and started a new timer", Toast.LENGTH_LONG).show();
}
});
}
};
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
Toast.makeText(getApplicationContext(), "a new service created",
Toast.LENGTH_LONG).show();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.d("MyLog", "a new service started");
final Handler mainHandler = new Handler(getApplicationContext().getMainLooper());
mainHandler.post(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(), "serviceStarterd", Toast.LENGTH_LONG).show();
// Access the default SharedPreferences
SharedPreferences pref = getApplicationContext().getSharedPreferences("myGlobalPrefTable", MODE_PRIVATE);
SharedPreferences.Editor editor = pref.edit();
//open a boolean to tell if the service is activated for the first time it will say false
boolean serviceStateOn = pref.getBoolean("isServiceActivated", false);
if(serviceStateOn == false){
// Edit the saved preferences
Toast.makeText(getApplicationContext(), "a New Timer Started with Delay: "+timerDeley, Toast.LENGTH_LONG).show();
editor.putBoolean("isServiceActivated", true); // getting String
editor.commit();
timer = new Timer();
timer.scheduleAtFixedRate(timerTask, timerDeley, timerDeley);
} else {
Log.d ("myLog", "Service is on so do nothing");
}
}
});
return START_STICKY;
}
@Override
public void onDestroy() {
super.onDestroy();
Toast.makeText(getApplicationContext(), "service stoped",
Toast.LENGTH_LONG).show();
}
}
这是我的清单＆gt;
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.greenroad.candidate.mywallpaperchanger" >
<uses-permission android:name="android.permission.SET_WALLPAPER"/>
<application
android:allowBackup="true"
android:icon="@mipmap/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>
<service
android:name=".myService"
android:exported="false"
/>
</application>
</manifest>
答案 0 :(得分：0)
你需要制作一个能听取意图的接收器。完成。
然后在接收（）中，您可以开始服务。
答案 1 :(得分：0)
您需要添加Receiver Class。
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
在AndroidManifest.xml中的Application Tag中添加以下语句
<receiver android:name=".YourBroadcastReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter></receiver>
YourBroadcastReceiver.java
package com.test;
public class MyBroadcastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Intent startServiceIntent = new Intent(context, MyService.class);
context.startService(startServiceIntent);
}
}