关键字：android keyguard 锁屏程序不能 全屏显示 解锁界面 变小
在第一次烧写（用sd卡升级）完板子之后不能全屏显示，但是重启之后就是全屏显示的了。在网上看了下，有相同问题如下：
解法一：这个方法在网上比较长见，但是在我们的平台上有两个问题，不过有些平台会好的，不建议用这个：
解法二：这个方法解了我们的问题，测试这么长时间还没出现问题：（推荐）
frameworks\base\policy\src\com\android\internal\policy\impl\KeyguardViewManager.java.
android2.3.4_GB_T34H\frameworks\base\core\java\android\content\res\CompatibilityInfo.java
diff --git a/phone/com/android/internal/policy/impl/KeyguardViewManager.java b/phone/com/android/internal/policy/impl/KeyguardViewManager.java
index ba1d7f5..38bf161 100644
--- a/phone/com/android/internal/policy/impl/KeyguardViewManager.java
+++ b/phone/com/android/internal/policy/impl/KeyguardViewManager.java
@@ -28,6 +28,8 @@ import android.view.ViewGroup;
import android.view.ViewManager;
import android.view.WindowManager;
import android.widget.FrameLayout;
+import android.view.Display;
+import android.util.DisplayMetrics;
/**
* Manages creating, showing, hiding and resetting the keyguard. Calls back
@@ -97,9 +99,21 @@ public class KeyguardViewManager implements KeyguardWindowController {
if (mKeyguardHost == null) {
if (DEBUG) Log.d(TAG, "keyguard host is null, creating it...");
+ WindowManager wm = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
+ DisplayMetrics dm = new DisplayMetrics();
+ wm.getDefaultDisplay().getMetrics(dm);
+ Display display = wm.getDefaultDisplay();
+
+ int statusBarHeight = (int)Math.ceil( 25 * dm.density);
+ int height = display.getHeight();
+ int width = display.getWidth();
+
+ Log.i(TAG, "Display width = " + width);
+ Log.i(TAG, "Display height = " + height);
+ Log.i(TAG, "Statusbar height = " + statusBarHeight);
+
mKeyguardHost = new KeyguardViewHost(mContext, mCallback);
- final int stretch = ViewGroup.LayoutParams.MATCH_PARENT;
int flags = WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN
| WindowManager.LayoutParams.FLAG_SHOW_WALLPAPER
| WindowManager.LayoutParams.FLAG_KEEP_SURFACE_WHILE_ANIMATING
@@ -109,7 +123,7 @@ public class KeyguardViewManager implements KeyguardWindowController {
flags |= WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM;
}
WindowManager.LayoutParams lp = new WindowManager.LayoutParams(
- stretch, stretch, WindowManager.LayoutParams.TYPE_KEYGUARD,
+ width, (height - statusBarHeight), WindowManager.LayoutParams.TYPE_KEYGUARD,
flags, PixelFormat.TRANSLUCENT);
lp.softInputMode = WindowManager.LayoutParams.SOFT_INPUT_ADJUST_PAN;
lp.windowAnimations = com.android.internal.R.style.Animation_LockScreen;
解法二：这个方法解了我们的问题，测试这么长时间还没出现问题：（推荐）
1，android2.3.4_GB_T34H\frameworks\base\core\java\android\content\res
修改 frameworks/base/core/java/android/content/res/CompatibilityInfo.java中的如下部分：
public static void updateCompatibleScreenFrame(DisplayMetrics dm, int orientation,
Rect outRect) {
int width = dm.widthPixels;
int portraitHeight = (int) (DEFAULT_PORTRAIT_HEIGHT * dm.density + 0.5f);
int portraitWidth = (int) (DEFAULT_PORTRAIT_WIDTH * dm.density + 0.5f);
if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
int xOffset = (width - portraitHeight) / 2 ;
outRect.set(xOffset, 0, xOffset + portraitHeight, portraitWidth);
} else {
int xOffset = (width - portraitWidth) / 2 ;
outRect.set(xOffset, 0, xOffset + portraitWidth, portraitHeight);
}
把上面这段程序改为下面这一段程序：
==》
public static voidupdateCompatibleScreenFrame(DisplayMetrics dm, int orientation,
Rect outRect) {
int width = dm.widthPixels;
int portraitHeight = (int)(DEFAULT_PORTRAIT_HEIGHT * dm.density + 0.5f);
int portraitWidth = (int)(DEFAULT_PORTRAIT_WIDTH * dm.density + 0.5f);
if (orientation ==Configuration.ORIENTATION_LANDSCAPE) {
int xOffset = (width -portraitHeight) / 2 ;
+ outRect.set(0, 0, 0 + dm.widthPixels,dm.heightPixels); //新加入代码
- outRect.set(xOffset, 0, xOffset +portraitHeight, portraitWidth); //删除原来代码部分
} else
{
int xOffset = (width -portraitWidth) / 2 ;
+ outRect.set(0, 0, 0 +dm.widthPixels, dm.heightPixels); //新加入代码
- outRect.set(xOffset, 0, xOffset + portraitWidth, portraitHeight); //删除代码部分
}
}
红色部分是我们改动的代码,“-“ 是我们去除原始代码：
frameworks/base/core/java/android/content/res/CompatibilityInfo.java这里面，DEFAULT_PORTRAIT_HEIGHT /DEFAULT_PORTRAIT_WIDTH 这两个值比较重要。
打印出一些值，下面分析：
dm.density = 1.5 portraitHeight = 720 portraitWidth = 480 dm.widthPixels = 1024 dm.heightPixels= 600 width = dm.widthPixels
其实出现偏移的原因是：
假设横屏：
不正常情况下分析 ：
xOffset = (width - portraitHeight) / 2= （1024-720）/ 2 = 152
所在在程序中原来的代码是
outRect.set(xOffset, 0, xOffset + portraitHeight, portraitWidth);//原始代码
outRect.set(152, 0, 152+ 720, 480);
xOffset 所以有了左右的偏移，如下图所示：
改动后，正常情况下分析：
改动后计算：
outRect.set(0,
0, 0 + dm.widthPixels, dm.heightPixels);
outRect.set(0, 0, 0 + 1024, 600);
