Q5有个功能,通过长按menu按键,可以旋转屏幕方向(0°或者90°),这个功能有时蛮有用的,下面来看看是如何实现的:
1 修改按键处理程序
frameworks/policies/base/phone/com/android/internal/policy/impl/PhoneWindowManager.java
函数
public boolean interceptKeyTi(WindowState win, int code, int metaKeys, boolean down,
int repeatCount, int flags)
在处理菜单键的地方
if (code == KeyEvent.KEYCODE_MENU) {
final int chordBug = KeyEvent.META_SHIFT_ON;
if (down && repeatCount == 0) {
if (mEnableShiftMenuBugReports && (metaKeys & chordBug) == chordBug) {
Intent intent = new Intent(Intent.ACTION_BUG_REPORT);
mContext.sendOrderedBroadcast(intent, null);
return true;
} else if (SHOW_PROCESSES_ON_ALT_MENU &&
(metaKeys & KeyEvent.META_ALT_ON) == KeyEvent.META_ALT_ON) {
Intent service = new Intent();
service.setClassName(mContext, "com.android.server.LoadAverageService");
ContentResolver res = mContext.getContentResolver();
boolean shown = Settings.System.getInt(
res, Settings.System.SHOW_PROCESSES, 0) != 0;
if (!shown) {
mContext.startService(service);
} else {
mContext.stopService(service);
}
Settings.System.putInt(
res, Settings.System.SHOW_PROCESSES, shown ? 0 : 1);
return true;
}
}
//上面是原来的内容,下面是添加的新内容
else if (down && repeatCount == 20 && MenuKeyUp && (!keyguardOn)) {
//如果按下Menu键一定时间,抬起时执行此段函数
MenuKeyUp = false;
try {
int ro = mWindowManager.getRotation(); //获取当前方向
if( ro == ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE ) {
ro = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
} else {
ro = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
}
}
catch (RemoteException e) {
Log.v(TAG, "!!! getRotation fail !!!");
}
try {
//旋转屏幕
mWindowManager.setRotation(ro, true, Surface.FLAGS_ORIENTATION_ANIMATION_DISABLE);//最后可跟不同的参数,可实现一些旋转效果
}
catch (RemoteException e) {
Log.v(TAG, "!!! mWindowManager.setRotation fail !!!");
}
return true;
}
if(!down) {
MenuKeyUp = true;
}
}
2 修改实现选择的函数
/frameworks/base/services/java/com/android/server/WindowManagerService.java
找到该函数
public boolean setRotationUncheckedLocked(int rotation, int animFlags)
将以下妨碍选择的内容注释掉
//rotation = mPolicy.rotationForOrientationLw(mForcedAppOrientation,
// mRotation, mDisplayEnabled);
OK,重新编译后,长按Menu键即可实现屏幕旋转。
ps.杯具了,旋转屏幕后发现copybit模块有问题,刷屏会有残余。
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