wallpaper 图片小不能铺满桌面

当用户自定义壁纸的时候，如果采用了分辨率比较小的图片，就会导致铺不满屏幕，会留下黑影

解决思路：

根据平板的分辨率进行适应，如果图片的分辨率符合显示的分辨率则不做处理，否则 将图片进行相应的拉伸

关键点文件：/data/system/wallpaper_info.xml

每次更换壁纸，所对应的分辨率就会写在该文件之中

--- a/android/frameworks/base/services/java/com/android/server/WallpaperManagerService.java

+++ b/android/frameworks/base/services/java/com/android/server/WallpaperManagerService.java

@@ -663,8 +663,16 @@ class WallpaperManagerService extends IWallpaperManager.Stub {

height = Math.max(height, displaySize.y);



if (width != wallpaper.width || height != wallpaper.height) {

- wallpaper.width = width;

- wallpaper.height = height;

+ // wallpaper.width = width;

+ // wallpaper.height = height;

+ if(width < 1424 || height < 1280){

+ wallpaper.width = 1424;

+ wallpaper.height = 1280;

+ }else{

+ wallpaper.width = width;

+ wallpaper.height = height;

+

+ }

saveSettingsLocked(wallpaper);

if (mCurrentUserId != userId) return; // Don't change the properties now

if (wallpaper.connection != null) {

@@ -1160,11 +1168,16 @@ class WallpaperManagerService extends IWallpaperManager.Stub {



// We always want to have some reasonable width hint.

int baseSize = getMaximumSizeDimension();

+

+ if (DEBUG) Slog.v(TAG, "baseSize=== "+baseSize+" wallpaper.width= "+ wallpaper.width+" wallpaper.height== "+wallpaper.height);

if (wallpaper.width < baseSize) {

- wallpaper.width = baseSize;

+ //wallpaper.width = baseSize;

+ wallpaper.width =1424;

}

if (wallpaper.height < baseSize) {

- wallpaper.height = baseSize;

+ // wallpaper.height = baseSize*2;

+

+ wallpaper.height = 1280;

}

}



diff --git a/android/packages/apps/Launcher3/WallpaperPicker/src/com/android/launcher3/WallpaperCropActivity.java b/android/packages/apps/Launcher3/WallpaperPicker/src/com/android/launcher3/WallpaperCropActivity.java

index 561c4bb..14d2e41 100644

--- a/android/packages/apps/Launcher3/WallpaperPicker/src/com/android/launcher3/WallpaperCropActivity.java

+++ b/android/packages/apps/Launcher3/WallpaperPicker/src/com/android/launcher3/WallpaperCropActivity.java

@@ -812,10 +812,14 @@ public class WallpaperCropActivity extends Activity {

int savedHeight = sharedPrefs.getInt(WALLPAPER_HEIGHT_KEY, defaultWallpaperSize.y);

if (savedWidth != wallpaperManager.getDesiredMinimumWidth() ||

savedHeight != wallpaperManager.getDesiredMinimumHeight()) {

+ if(savedWidth < 1424 || savedHeight <1280){

+

+ wallpaperManager.suggestDesiredDimensions(1424, 1280);

+}else{

wallpaperManager.suggestDesiredDimensions(savedWidth, savedHeight);

}

}

-

+}

protected static RectF getMaxCropRect(

int inWidth, int inHeight, int outWidth, int outHeight, boolean leftAligned) {

RectF cropRect = new RectF();