手机app在平板上没有全屏显示

方案一：通过自己的demo测试得知，如下代码可以让当前窗口全屏显示

    private void setWindow(){
        WindowManager m = getWindowManager();
        Display d = m.getDefaultDisplay();  //为获取屏幕宽、高
        android.view.WindowManager.LayoutParams p = getWindow().getAttributes();  //获取对话框当前的参数值
        p.height = (int) (d.getHeight());   //高度设置为屏幕的0.6
        p.width = (int) (d.getWidth());    //宽度设置为屏幕的0.95
        getWindow().setAttributes(p);     //设置生效
    }

由于集成的app没有源码，所以在系统源码中查找setAttributes方法的具体实现。

设备实际分辨率为 1920x1080，在此方法中直接重新赋值 宽高为1920x1080

方案二：

--- a/core/java/android/app/Activity.java
+++ b/core/java/android/app/Activity.java
@@ -6671,13 +6671,37 @@ public class Activity extends ContextThemeWrapper
     public void setRequestedOrientation(@ActivityInfo.ScreenOrientation int requestedOrientation) {
         if (mParent == null) {
             try {
-                ActivityTaskManager.getService().setRequestedOrientation(
-                        mToken, requestedOrientation);
-            } catch (RemoteException e) {
+//                ActivityTaskManager.getService().setRequestedOrientation(
+//                        mToken, requestedOrientation);
+               if(mApplication != null && mApplication.getApplicationInfo() != null
+                                   && mApplication.getApplicationInfo().uid > 10000){
+                      ActivityTaskManager.getService().setRequestedOrientation(
+                         mToken, ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
+               }else{
+                       ActivityTaskManager.getService().setRequestedOrientation(
+                          mToken, requestedOrientation);
+               }
+
+               } catch (RemoteException e) {
                 // Empty
             }
         } else {
-            mParent.setRequestedOrientation(requestedOrientation);
+//            mParent.setRequestedOrientation(requestedOrientation);
+            try {
+               if(mApplication != null && mApplication.getApplicationInfo() != null
+                                   && mApplication.getApplicationInfo().uid > 10000){
+                      ActivityTaskManager.getService().setRequestedOrientation(
+                         mToken, ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
+               }else{
+                       mParent.setRequestedOrientation(requestedOrientation);
+               }
+            } catch (RemoteException e) {
+                // Empty
+            }
         }
     }

diff --git a/core/java/android/content/pm/parsing/component/ParsedActivityUtils.java b/core/java/android/content/pm/parsing/component/ParsedActivityUtils.java
index fb8fd74545c..0f8f7e35c34 100644
--- a/core/java/android/content/pm/parsing/component/ParsedActivityUtils.java
+++ b/core/java/android/content/pm/parsing/component/ParsedActivityUtils.java
@@ -146,7 +146,16 @@ public class ParsedActivityUtils {
                         sa.getInt(R.styleable.AndroidManifestActivity_configChanges, 0),
                         sa.getInt(R.styleable.AndroidManifestActivity_recreateOnConfigChanges, 0));

-                int screenOrientation = sa.getInt(R.styleable.AndroidManifestActivity_screenOrientation, SCREEN_ORIENTATION_UNSPECIFIED);
+                //int screenOrientation = sa.getInt(R.styleable.AndroidManifestActivity_screenOrientation, SCREEN_ORIENTATION_UNSPECIFIED);
+               int screenOrientation;
+               if (pkg.getSharedUserId() == null){
+                       screenOrientation = 0;
+               }else{
+                       screenOrientation = sa.getInt(R.styleable.AndroidManifestActivity_screenOrientation, SCREEN_ORIENTATION_UNSPECIFIED);
+               }
                 int resizeMode = getActivityResizeMode(pkg, sa, screenOrientation);
                 activity.screenOrientation = screenOrientation;
                 activity.resizeMode = resizeMode;