本篇内容主要讲解“Android如何设置默认锁屏壁纸接口”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“Android如何设置默认锁屏壁纸接口”吧!
完成自定义service后,接下来就是具体实现接口
在frameworks/base/core/java/android/app/customized/ICustomizedService.aidl中定义接口
boolean setLockScreenWallpaper(String uri);在frameworks/base/core/java/android/app/customized/CustomizedManager.java中实现接口
package android.app.customized; import android.util.Log;import android.content.Context;import android.content.Intent;import android.os.Binder;import android.os.RemoteException;import android.provider.Settings;import java.io.IOException;import android.os.ServiceManager;import android.os.IBinder;import java.util.List;import android.app.ActivityManager;import android.graphics.Bitmap; public class CustomizedManager{ private static final String TAG="CustomizedManager"; private static final boolean DBG=true; private static ICustomizedService mService; private final Context mContext; public CustomizedManager(Context context){ mContext = context; mService = ICustomizedService.Stub.asInterface( ServiceManager.getService("customized")); } private static ICustomizedService getService(){ if (mService != null) { return mService; } IBinder b = ServiceManager.getService("customized" mService = ICustomizedService.Stub.asInterface(b); return mService; } public boolean setLockScreenWallpaper(String uri) { try { getService().setLockScreenWallpaper(uri); } catch (RemoteException e) { } return false; } }在frameworks/base/services/core/java/com/android/server/customized/CustomizedService.java中对AIDL文件中定义的接口进行具体实现.
package com.android.server.customized; import android.os.IBinder;import android.os.ServiceManager;import android.content.Context;import android.content.Intent;import android.os.Binder;import android.app.customized.ICustomizedService;import android.content.BroadcastReceiver;import android.view.IWindowManager;import android.view.WindowManagerGlobal;import android.graphics.BitmapFactory; public class CustomizedService extends ICustomizedService.Stub { private static final String TAG = "CustomizedService "; private Context mContext; public static class Lifecycle extends SystemService { private CustomizedService mService; public Lifecycle(Context context) { super(context); } @Override public void onStart() { mService = new CustomizedService (getContext()); publishBinderService(Context.CUSTOMIZED, mService); } @Override public void onBootPhase(int phase) { } @Override public void onUnlockUser(int userHandle) { } } public CustomizedService (Context context) { mContext = context; } public boolean setLockScreenWallpaper(String uri) { if (uri == null || "".equals(uri)) return false; File file = new File(uri); if (!file.exists()) { return false; } Log.d(TAG, "setLockScreenWallpaper uri===============" + uri); long ident = Binder.clearCallingIdentity(); Intent sendlock = new Intent(); String packageName = "com.android.launcher3"; String serviceClassName = packageName + ".LockScreenWallPaperService"; sendlock.putExtra("path", uri); sendlock.setComponent(new ComponentName(packageName, serviceClassName)); mContext.startServiceAsUser(sendlock, UserHandle.OWNER); Binder.restoreCallingIdentity(ident); return true; } }在packages/apps/Launcher3/AndroidManifest.xml中注册LockScreenWallPaperService
<service android:name="com.android.launcher3.LockScreenWallPaperService" android:exported="true" > <intent-filter> <action android:name="com.android.launcher.action.SET_LOCKSCREENWALLPAPER_SERVICE" /> </intent-filter></service>因为我们只是在CustomizedService 中调用setLockScreenWallpaper方法启动LockScreenWallPaperService,所以设置默认wallpaper还是要由setLockScreenWallpaper实现的.下面要实现LockScreenWallPaperService了,路径为packages/apps/Launcher3/src/com/android/launcher3/LockScreenWallPaperService.java
package com.android.launcher3; import android.app.Service;import android.os.*;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.content.Context;import android.content.Intent;import android.graphics.Matrix;import android.util.Log;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException; public class LockScreenWallPaperService extends Service { private String TAG = "LockScreenWallPaperService"; private String path = ""; @Override public void onCreate() { } @Override public int onStartCommand(Intent intent, int flags, int startId) { Log.d(TAG, "onStartCommand "); if (intent != null) { path = intent.getStringExtra("path"); } Bitmap bitmap = BitmapFactory.decodeFile(path); SavePicToLocal savePic = new SavePicToLocal(bitmap); savePic.execute("save picture"); return START_STICKY; } public boolean dumpBitmap(Bitmap mBitmap) throws FileNotFoundException { Log.d(TAG, "dumpBitmap"); boolean flagSaveCompelete = false; Bitmap bitmap_land, bitmap_port; int height = mBitmap.getHeight(); int width = mBitmap.getWidth(); int lswidth = 1920; int lsheight = 1200; float lper = Math.max((float) lswidth / (float) width, (float) lsheight / (float) height); if (lper > 1) { Matrix lmatrix = new Matrix(); lmatrix.postScale(lper, lper); bitmap_land = Bitmap.createBitmap(mBitmap, (int) ((mBitmap.getWidth() - lswidth / lper) / 2), (int) ((mBitmap.getHeight() - lsheight / lper) / 2), (int) (lswidth / lper), (int) (lsheight / lper), lmatrix, true); } else { bitmap_land = Bitmap.createBitmap(mBitmap, (int) ((mBitmap.getWidth() - lswidth) / 2), (int) ((mBitmap.getHeight() - lsheight) / 2), lswidth, lsheight, null, true); } int pswidth = 1200; int psheight = 1920; float pper = Math.max((float) pswidth / (float) width, (float) psheight / (float) height); if (pper > 1) { Matrix pmatrix = new Matrix(); pmatrix.postScale(pper, pper); bitmap_port = Bitmap.createBitmap(mBitmap, (int) ((mBitmap.getWidth() - pswidth / pper) / 2), (int) ((mBitmap.getHeight() - psheight / pper) / 2), (int) (pswidth / pper), (int) (psheight / pper), pmatrix, true); } else { bitmap_port = Bitmap.createBitmap(mBitmap, (int) ((mBitmap.getWidth() - pswidth) / 2), (int) ((mBitmap.getHeight() - psheight) / 2), pswidth, psheight, null, true); } Matrix matrix = new Matrix(); matrix.postScale(0.5f, 0.5f); bitmap_land = Bitmap.createBitmap(bitmap_land, 0, 0, bitmap_land.getWidth(), bitmap_land.getHeight(), matrix, true); bitmap_port = Bitmap.createBitmap(bitmap_port, 0, 0, bitmap_port.getWidth(), bitmap_port.getHeight(), matrix, true); flagSaveCompelete = saveBitmapToFile( bitmap_port, "/data/local/tmp/lockscreenwallpaper/keyguard_wallpaper_land.png", 1); flagSaveCompelete = saveBitmapToFile( bitmap_land, "/data/local/tmp/lockscreenwallpaper/keyguard_wallpaper_port.png", 2); return flagSaveCompelete; } private boolean saveBitmapToFile(Bitmap bitmap, String path, int isRecycle) throws FileNotFoundException { Log.d(TAG, "saveBitmapToFile ident=" + "bitmap" + bitmap); boolean result = false; if (bitmap == null) return result; Bitmap tmpbm = null; java.io.FileOutputStream tmpfos = null; try { tmpbm = bitmap; tmpfos = new java.io.FileOutputStream(path); tmpbm.compress(Bitmap.CompressFormat.PNG, 100, tmpfos); Log.d(TAG, "saveBitmapToFile compress"); } catch (FileNotFoundException ex) { Log.d(TAG, "ex1" + ex); throw ex; } catch (java.io.IOException ex) { Log.d(TAG, "ex2" + ex); ex.printStackTrace(); } finally { if (tmpfos != null) { try { Log.d(TAG, "tmpfos.close() "); tmpfos.close(); result = true; } catch (java.io.IOException ex) { Log.d(TAG, "ex3" + ex); } } if (tmpbm != null && !tmpbm.isRecycled()) if (isRecycle == 2) { tmpbm.recycle(); } } return result; } class SavePicToLocal extends AsyncTask<String, Integer, Boolean> { Bitmap bitmap; public SavePicToLocal(Bitmap mBitmap) { bitmap = mBitmap; } @Override protected Boolean doInBackground(String... params) { return dumpBitmaps(); } private boolean dumpBitmaps() { boolean flag = false; try { flag = dumpBitmap(bitmap); flag = true; } catch (FileNotFoundException e) { } return flag; } @Override protected void onPostExecute(Boolean result) { if (result) { sendBroadcast(new Intent( "android.intent.action.UPDATE_LOCK_WALLPAPER")); Log.d(TAG, "send UPDATE_LOCK_WALLPAPER"); } } @Override protected void onProgressUpdate(Integer... values) { super.onProgressUpdate(values); } } @Override public IBinder onBind(Intent intent) { return null; } }然后编译一下,就可以通过接口设置默认桌面了,大功告成
到此，相信大家对“Android如何设置默认锁屏壁纸接口”有了更深的了解，不妨来实际操作一番吧！这里是编程网网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！
