最近在开7.0的坑，遇到了一些小问题，记录一下。很大可能这个问题只是我这个芯片的代码上才存在的，不过殊途同归啦。
第一个问题就是，我们增加内置可选壁纸，选择这些壁纸后进行设置，会发现拉伸很明显。通过增加打印log发现
diff --git a/src/com/android/wallpaperpicker/WallpaperCropActivity.java b/src/com/android/wallpaperpicker/WallpaperCropActivity.java
old mode
new mode
index bdb601b.d1551
--- a/src/com/android/wallpaperpicker/WallpaperCropActivity.java
+++ b/src/com/android/wallpaperpicker/WallpaperCropActivity.java
@@ -, +, @@ public class WallpaperCropActivity extends Activity implements Handler.Callback
Point inSize = mCropView.getSourceDimensions();
Point outSize = WallpaperUtils.getDefaultWallpaperSize(getResources(),
getWindowManager());
+ android.util.Log.d(LOGTAG,"inSize.x = " + inSize.x + " inSize.y = " + inSize.y
+ + " outSize.x = " + outSize.x + " outSize.y = " + outSize.y);
RectF crop = Utils.getMaxCropRect(
inSize.x, inSize.y, outSize.x, outSize.y, false);
// Passing 0, 0 will cause launcher to revert to using the
// default wallpaper size
CropAndFinishHandler onEndCrop = new CropAndFinishHandler(new Point(, ),
shouldFadeOutOnFinish);
CropAndSetWallpaperTask cropTask = new CropAndSetWallpaperTask(
streamProvider, this, crop, streamProvider.getRotationFromExif(this),
outSize.x, outSize.y, onEndCrop);
DialogUtils.executeCropTaskAfterPrompt(this, cropTask, getOnDialogCancelListener());
}
我们的壁纸尺寸是1024*600，log打印的inSize都是正确的，但是outSize却变成了1200*1024了，由此产生了壁纸设置后有拉伸的情况。
因此问题就是出在这个Size的变化上，我们继续跟踪源码，会发现
diff --git a/src/com/android/wallpaperpicker/WallpaperUtils.java b/src/com/android/wallpaperpicker/WallpaperUtils.java
old mode
new mode
index .a4d88d7
--- a/src/com/android/wallpaperpicker/WallpaperUtils.java
+++ b/src/com/android/wallpaperpicker/WallpaperUtils.java
@@ -, +, @@ public final class WallpaperUtils {
// We need to ensure that there is enough extra space in the wallpaper
// for the intended parallax effects
- final int defaultWidth, defaultHeight;
+ int defaultWidth, defaultHeight;
if (res.getConfiguration().smallestScreenWidthDp >= ) {
defaultWidth = (int) (maxDim * wallpaperTravelToScreenWidthRatio(maxDim, minDim));
defaultHeight = maxDim;
@@ -, +, @@ public final class WallpaperUtils {
defaultWidth = Math.max((int) (minDim * WALLPAPER_SCREENS_SPAN), maxDim);
defaultHeight = maxDim;
}
+ android.util.Log.d("WallpaperCropActivity"," res.getConfiguration().smallestScreenWidthDp = "
+ + res.getConfiguration().smallestScreenWidthDp + " defaultWidth = " + defaultWidth
+ + " minDim =" + minDim + " maxDim =" + maxDim);
+ defaultWidth = maxDim;
+ defaultHeight = minDim;
sDefaultWallpaperSize = new Point(defaultWidth, defaultHeight);
}
return sDefaultWallpaperSize;
问题的根源就是这个defaultWidth和defaultHeight啦。继续打印log发现maxDim和minDim就是我们正确的壁纸尺寸，这两个变量都是final的更改下修饰符，同时将最终设置的尺寸更改为正确的，辣么设置的壁纸的拉伸问题就暂时解决了。
第二个问题，就是设置sd卡中的图片作为壁纸，这个东西源码分析的过程比较复杂。可以通过dumpsys wallpaper以及dumpsys SurfaceFlinger来查看图片的设置尺寸。更改的地方涉及三处。分别是launcher3、framework/base/core以及SystemUI。
packages/apps/Launcher3
diff --git a/src/com/android/launcher3/InvariantDeviceProfile.java b/src/com/android/launcher3/InvariantDeviceProfile.java
index ..ecd3ad6
--- a/src/com/android/launcher3/InvariantDeviceProfile.java
+++ b/src/com/android/launcher3/InvariantDeviceProfile.java
@@ -, +, @@ public class InvariantDeviceProfile {
(int) (largeSide * wallpaperTravelToScreenWidthRatio(largeSide, smallSide)),
largeSide);
} else {
- defaultWallpaperSize = new Point(Math.max(smallSide * , largeSide), largeSide);
+ defaultWallpaperSize = new Point(largeSide, largeSide);
}
}
frameworks/base
--- a/core/java/android/app/WallpaperManager.java
+++ b/core/java/android/app/WallpaperManager.java
@@ -, +, @@ import android.os.SystemProperties;
import android.os.UserHandle;
import android.text.TextUtils;
import android.util.Log;
+import android.view.WindowManager;
import android.view.WindowManagerGlobal;
import libcore.io.IoUtils;
@@ -, +, @@ public class WallpaperManager {
mCachedWallpaper = null;
mCachedWallpaperUserId = ;
try {
- mCachedWallpaper = getCurrentWallpaperLocked(userId);
+ mCachedWallpaper = getCurrentWallpaperLocked(context,userId);
mCachedWallpaperUserId = userId;
} catch (OutOfMemoryError e) {
Log.w(TAG, "No memory load current wallpaper", e);
@@ -, +, @@ public class WallpaperManager {
}
}
- private Bitmap getCurrentWallpaperLocked(int userId) {
+ private Bitmap getCurrentWallpaperLocked(Context context,int userId) {
if (mService == null) {
Log.w(TAG, "WallpaperService not running");
return null;
@@ -, +, @@ public class WallpaperManager {
params, userId);
if (fd != null) {
try {
+ WindowManager mWindowManager = (WindowManager)context.getSystemService(Context.WINDOW_SERVICE);
+ int wW = mWindowManager.getDefaultDisplay().getWidth();
+ int wH = mWindowManager.getDefaultDisplay().getHeight();
BitmapFactory.Options options = new BitmapFactory.Options();
+ options.inJustDecodeBounds = true;
+ BitmapFactory.decodeFileDescriptor(
+ fd.getFileDescriptor(), null, options);
+ options.inSampleSize = calculateInSampleSize(options, wW,wH);
+ options.inJustDecodeBounds = false;
return BitmapFactory.decodeFileDescriptor(
fd.getFileDescriptor(), null, options);
} catch (OutOfMemoryError e) {
@@ -, +, @@ public class WallpaperManager {
return null;
}
+ private int calculateInSampleSize(BitmapFactory.Options options,int reqWidth, int reqHeight){
+ int width = options.outWidth;
+ int height = options.outHeight;
+ int inSampleSize = ;
+ if (width > reqWidth && height > reqHeight){
+ int widthRatio = Math.round((float) width / (float) reqWidth);
+ int heightRatio = Math.round((float) width / (float) reqWidth);
+ inSampleSize = Math.max(widthRatio, heightRatio);
+ }
+ return inSampleSize;
+ }
+
private Bitmap getDefaultWallpaper(Context context, @SetWallpaperFlags int which) {
+ WindowManager mWindowManager = (WindowManager)context.getSystemService(Context.WINDOW_SERVICE);
+ int wW = mWindowManager.getDefaultDisplay().getWidth();
+ int wH = mWindowManager.getDefaultDisplay().getHeight();
InputStream is = openDefaultWallpaper(context, which);
if (is != null) {
try {
BitmapFactory.Options options = new BitmapFactory.Options();
+ options.inJustDecodeBounds = true;
+ BitmapFactory.decodeStream(is, null, options);
+ options.inSampleSize = calculateInSampleSize(options, wW,wH);
+ options.inJustDecodeBounds = false;
return BitmapFactory.decodeStream(is, null, options);
} catch (OutOfMemoryError e) {
Log.w(TAG, "Can't decode stream", e);
diff --git a/packages/SystemUI/src/com/android/systemui/ImageWallpaper.java b/packages/SystemUI/src/com/android/systemui/ImageWallpaper.java
index c88931d..fecc47e
--- a/packages/SystemUI/src/com/android/systemui/ImageWallpaper.java
+++ b/packages/SystemUI/src/com/android/systemui/ImageWallpaper.java
@@ -, +, @@ public class ImageWallpaper extends WallpaperService {
surfaceHeight = Math.max(displayInfo.logicalHeight, mBackgroundHeight);
}
- if (FIXED_SIZED_SURFACE) {
+ //Log.d(TAG,"----surfaceWidth = "+surfaceWidth+" surfaceHeight= "+surfaceHeight);
+ /*if (FIXED_SIZED_SURFACE) {
// Used a fixed size surface, because we are special. We can do
// this because we know the current design of window animations doesn't
// cause this to break.
surfaceHolder.setFixedSize(surfaceWidth, surfaceHeight);
mLastRequestedWidth = surfaceWidth;
mLastRequestedHeight = surfaceHeight;
- } else {
+ } else*/ {
surfaceHolder.setSizeFromLayout();
}
return hasWallpaper;