关于Android4.x系统默认显示方向各种修改

1.设置属性值

在device.mk文件中加入 PRODUCT_PROPERTY_OVERRIDES += \  ro.sf.hwrotation=180

2.设置屏幕默认显示方向

在frameworks/native/services/surfaceflinger/SurfaceFlinger.cpp文件中找到方法

GraphicPlane::setDisplayHardware(DisplayHardware *hw)

if (property_get("ro.sf.hwrotation", property, NULL) > 0) { //displayOrientation switch (atoi(property)) { case 90: displayOrientation = ISurfaceComposer::eOrientation90; break; case 270: displayOrientation = ISurfaceComposer::eOrientation270; break; case 180://=============add======== displayOrientation = ISurfaceComposer::eOrientation180; break;//=============add======== } }

3.设置屏幕显示动画旋转方向

1).在frameworks/base/core/java/android/view/Surface.java 加入方法

/** * @hide */ public static int getDefaultRotation() { return android.os.SystemProperties.getInt("ro.sf.hwrotation", 0); } /** * @hide */ public static int getDefaultRotationIndex() { int rotation = getDefaultRotation(); switch(rotation) { case 0: return ROTATION_0; case 90: return ROTATION_90; case 180: return ROTATION_180; case 270: return ROTATION_270; } return ROTATION_0; } 2).在frameworks/base/services/java/com/android/server/wm/ScreenRotationAnimation.java  文件中找到(android4.1) 方法setRotation

或(android4.2)方法setRotationInTransaction

修改 deltaRotation(rotation,Surface.ROTATION_0);

为deltaRotation(rotation,Surface. getDefaultRotationIndex());

 

3 .长按Home键，最近程序视图方向

在frameworks/base/packages/SystemUI/src/com/android/systemui/recent/RecentsPanelView.java 文件中修改如下

private int mThumbnailHeight;//================add============

在方法中添加

public void updateValuesFromResources() { final Resources res = mContext.getResources(); mThumbnailWidth = Math.round(res.getDimension(R.dimen.status_bar_recents_thumbnail_width)); //==========================xjf========================= mThumbnailHeight = Math.round(res.getDimension(R.dimen.status_bar_recents_thumbnail_height)); //==========================xjf========================= mFitThumbnailToXY = res.getBoolean(R.bool.config_recents_thumbnail_image_fits_to_xy); }

 

在方法中添加

private void updateThumbnail(ViewHolder h, Bitmap thumbnail, boolean show, boolean anim) { 。。。。。。。。。。。。。。。。

if (mFitThumbnailToXY) { h.thumbnailViewImage.setScaleType(ScaleType.FIT_XY); } else { Matrix scaleMatrix = new Matrix(); float scale = mThumbnailWidth / (float) thumbnail.getWidth(); scaleMatrix.setScale(scale, scale); h.thumbnailViewImage.setScaleType(ScaleType.MATRIX); h.thumbnailViewImage.setImageMatrix(scaleMatrix); //==========================xjf========================= if(android.view.Surface.getDefaultRotation() > 0){ Matrix rotateMatrix = new Matrix(); rotateMatrix.setRotate(android.view.Surface.getDefaultRotation(),mThumbnailWidth/2, mThumbnailHeight/2); h.thumbnailViewImage.setImageMatrix(rotateMatrix); } //==========================xjf========================= } }

 

4.电源键加音量减，截屏图片方向

在/opt/xiejifu/20141005/20141005/frameworks/base/packages/SystemUI/src/com/android/systemui/screenshot/GlobalScreenshot.java 文件中找到takeScreenshot方法

修改 float degrees = getDegreesForRotation(mDisplay.getRotation());

void takeScreenshot(Runnable finisher, boolean statusBarVisible, boolean navBarVisible) { // We need to orient the screenshot correctly (and the Surface api seems to take screenshots // only in the natural orientation of the device :!) mDisplay.getRealMetrics(mDisplayMetrics); float[] dims = {mDisplayMetrics.widthPixels, mDisplayMetrics.heightPixels}; //==========================xjf========================= //float degrees = getDegreesForRotation(mDisplay.getRotation()); int rotation = mDisplay.getRotation(); if(Surface.getDefaultRotation() > 0){ rotation = (rotation + Surface.getDefaultRotationIndex())%4; }//get def rotation float degrees = getDegreesForRotation(rotation); //==========================xjf========================= boolean requiresRotation = (degrees > 0); if (requiresRotation) { // Get the dimensions of the device in its native orientation mDisplayMatrix.reset(); mDisplayMatrix.preRotate(-degrees); mDisplayMatrix.mapPoints(dims); dims[0] = Math.abs(dims[0]); dims[1] = Math.abs(dims[1]); } ......... } 5.NFC点对点，发送截屏图片 packages/apps/Nfc/src/com/android/nfc/SendUi.java

Bitmap createScreenshot() { ....... //==========================xjf========================= //float degrees = getDegreesForRotation(mDisplay.getRotation()); int rotation = mDisplay.getRotation(); if(Surface.getDefaultRotation() > 0){ rotation = (rotation + Surface.getDefaultRotationIndex())%4; }//get def rotation float degrees = getDegreesForRotation(rotation); //==========================xjf========================= ....... }

除了截图，其他修改应该都是全局的。