android 设置锁屏壁纸

最新推荐文章于 2025-03-24 20:09:20 发布

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最新推荐文章于 2025-03-24 20:09:20 发布

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分类专栏： android 文章标签：设置锁屏壁纸

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本文详细介绍了如何在Android应用中实现自定义锁屏壁纸的功能。通过分析系统的壁纸设置流程，结合上一期关于Android 5.1设置壁纸的文章，提出利用广播来实现这一功能。具体实现涉及BitmapCropTask类的修改和操作。

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客户功能需求：设置可以自定义的锁屏壁纸。

分析：首先分析系统壁纸设置过程，参考上一期文章，Android5.1 设置壁纸流程简析。可以按照设置壁纸的方式，模仿实现设置锁屏壁纸的功能。

利用广播，实现设置锁屏壁纸功能。

具体实现：

①.packages/apps/Trebuchet/WallpaperPicker/res/layout/actionbar_set_wallpaper.xml

<!-- 增加Linerlayout布局 包裹两个控件-->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:orientation="horizontal" >

<com.android.launcher3.AlphaDisableableButton
    xmlns:android="http://schemas.android.com/apk/res/android"
    style="@style/ActionBarSetWallpaperStyle"
    android:id="@+id/set_wallpaper_button"
    android:layout_width="0dip"
    android:layout_weight="1"
    android:layout_height="match_parent"
    android:paddingRight="20dp"
    android:drawableLeft="@drawable/ic_actionbar_accept"
    android:drawablePadding="8dp"
    android:gravity="start|center_vertical"
    android:text="@string/wallpaper_instructions">
</com.android.launcher3.AlphaDisableableButton>

<!-- 模仿上面写一个设置锁屏的button 加入weight =1 ,使两按钮平分-->
<com.android.launcher3.AlphaDisableableButton
    xmlns:android="http://schemas.android.com/apk/res/android"
    style="@style/ActionBarSetWallpaperStyle"
    android:id="@+id/set_lockscreen_button"
    android:layout_width="0dip"
    android:layout_weight="1"
    android:layout_height="match_parent"
    android:paddingRight="20dp"
    android:drawableLeft="@drawable/ic_actionbar_accept"
    android:drawablePadding="8dp"
    android:gravity="start|center_vertical"
    android:text="@string/lock_screen_instructions">
</com.android.launcher3.AlphaDisableableButton>

②.packages/apps/Trebuchet/WallpaperPicker/src/com/android/launcher3/WallpaperPickerActivity.java

 protected void init() {
        setContentView(R.layout.wallpaper_picker);
……
 // Action bar
        // Show the custom action bar view
        final ActionBar actionBar = getActionBar();
        actionBar.setCustomView(R.layout.actionbar_set_wallpaper);
//取消ActionBar点击事件，分别给两个按钮设置点击事件
        /*actionBar.getCustomView().setOnClickListener(
                new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        if (mSelectedTile != null) {
                            WallpaperTileInfo info = (WallpaperTileInfo) mSelectedTile.getTag();
                            info.onSave(WallpaperPickerActivity.this);
                        } else {
                            // no tile was selected, so we just finish the activity and go back
                            setResult(Activity.RESULT_OK);
                            finish();
                        }
                    }
                });*/
        mSetWallpaperButton = findViewById(R.id.set_wallpaper_button);
	mSetLockScreenButton = findViewById(R.id.set_lockscreen_button);

	mSetWallpaperButton.setOnClickListener(
                new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        if (mSelectedTile != null) {
                            WallpaperTileInfo info = (WallpaperTileInfo) mSelectedTile.getTag();
                            info.onSave(WallpaperPickerActivity.this);
                        } else {
                            // no tile was selected, so we just finish the activity and go back
                            setResult(Activity.RESULT_OK);
                            finish();
                        }
                    }
                });

	mSetLockScreenButton.setOnClickListener(
                new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        if (mSelectedTile != null) {
                            WallpaperTileInfo info = (WallpaperTileInfo) mSelectedTile.getTag();
                            info.onSave(WallpaperPickerActivity.this);
                        } else {
                           // no tile was selected, so we just finish the activity and go back
                            setResult(Activity.RESULT_OK);
                            finish();
                        }
Log.i("TAG","lockscreen button click");
                    }
                });

③.packages/apps/Trebuchet/WallpaperPicker/src/com/android/launcher3/WallpaperCropActivity.java

在BitmapCropTask中实现

if (mSetWallpaper && mNoCrop) { 
      try {
        InputStream is = regenerateInputStream();
        if (is != null) {

              //增加判断是否是点击设置锁屏壁纸按钮
		if(isLockWallpaper==true){
			byte[] outByteArray = toByteArray(is);//流转byte数字，用于发送广播
			Intent intent = new Intent("android.yue.lockscreen.action");//自定义广播
			intent.putExtra("outByteArray",outByteArray);
			mContext.sendBroadcast(intent);
		}else{
			wallpaperManager.setStream(is);
			Utils.closeSilently(is);
		} 
	  }
       } catch (IOException e) {
	  Log.w(LOGTAG, "cannot write stream to wallpaper", e);
	  failure = true;
	}
	return !failure;	
} else {
……
//else中同样有设置壁纸的方法
wallpaperManager.setStream(new ByteArrayInputStream(outByteArray));
//在这里同样需要做如上判读，具体实现同上。
}

④./frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java

（2）PhoneStatusBar.java中：

 //begin 添加下面一行
       PanelHolder   mHolder;//成员变量
       //end
...
       protected PhoneStatusBarView makeStatusBarView() {
           ...
           //begin 将下面第一行替换为第二行
           PanelHolder   holder = (PanelHolder) mStatusBarWindow.findViewById(R.id.panel_holder);           
          mHolder = (PanelHolder) mStatusBarWindow.findViewById(R.id.panel_holder);
          //end
          ...
}
 
    private void updateKeyguardState(boolean goingToFullShade, boolean fromShadeLocked) {
          ...
            if (mState == StatusBarState.KEYGUARD || mState == StatusBarState.SHADE_LOCKED) {
                      //begin 添加下面一段
		      final Drawable drawable =new android.graphics.drawable.BitmapDrawable(bitmap);//广播中接收的bitmap，转换为Drawable，并设置
                      mHolder.post(new Runnable(){
                             public void run(){
                                  mholder.setBackgroundResource(R.drawable.keyguard_wallpaper);
                             }
                      });
 
                      //end
                      mScrimController.setKeyguardShowing(true);
        } else {
                      //begin 添加下面一行
                      mHolder.setBackgroundResource(0);
                      //end  
                      mScrimController.setKeyguardShowing(false);
        }
          ...
}

//加入广播,记得注册广播
private final BroadcastReceiver mTestReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            if ("android.yue.lockscreen.action".equals(intent.getAction())) {
               
             outByteArray= intent.getExtras().getByteArray("outByteArray");
			   Log.i("TAG","outByteArray=====------ "+outByteArray);
			   InputStream is = new ByteArrayInputStream(outByteArray);
			   bitmap = BitmapFactory.decodeStream(is);
            }
        }
    };

大体是这样，代码细节没有贴全。仅此记录。