[英]WindowManager addView() not respecting MATCH_PARENT
使用WindowManager將布局顯示為疊加層時出現問題。 布局僅覆蓋足夠的區域以顯示其子視圖覆蓋的最小的最小區域,而不是全屏顯示。
我正在使用以下代碼來使用WindowManager顯示布局:
LinearLayout linearLayout = new LinearLayout(MainActivity.this);
LayoutInflater inflater = LayoutInflater.from(MainActivity.this);
View inflatedLayout = inflater.inflate(R.layout.note_taking_layout, null, false);
linearLayout.addView(inflatedLayout);
final WindowManager.LayoutParams paramsForOverlay = new WindowManager.LayoutParams(
WindowManager.LayoutParams.MATCH_PARENT,
WindowManager.LayoutParams.MATCH_PARENT,
WindowManager.LayoutParams.TYPE_SYSTEM_ERROR, // this allows it to show over lock screen AND be able to receive touch.
FLAG_TRANSLUCENT_STATUS | FLAG_NOT_TOUCH_MODAL,
PixelFormat.TRANSLUCENT);
paramsForOverlay.gravity = Gravity.TOP | Gravity.CENTER;
WindowManager windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
windowManager.getDefaultDisplay().getMetrics(new DisplayMetrics());
if (windowManager != null) {
linearLayout.setLayoutParams(new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT));
windowManager.addView(linearLayout, paramsForOverlay);
}
這是R.layout.note_taking_layout的xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:id="@+id/llCanvas"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="@color/colorPrimary"
android:orientation="vertical">
<TextView
android:layout_gravity="center"
android:text="ABCD"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
<LinearLayout
android:layout_weight="1"
android:background="@color/colorPrimaryDark"
android:layout_width="match_parent"
android:orientation="vertical"
android:layout_height="0dp">
<TextView
android:textColor="@android:color/white"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="world" />
<Button
android:id="@+id/bDestroy"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="hello" />
</LinearLayout>
這是它的外觀:
這實際上是這樣的:
我該怎么做才能覆蓋整個屏幕?
編輯:我顯示一個按鈕,並使用此按鈕將其擴展到全屏:
final Button button = new Button(MainActivity.this);
button.setText("tis a button");
button.setLayoutParams(
new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.MATCH_PARENT));
經過反復試驗,我發現我沒有將MATCH_PARENT設置為View inflatedLayout。 所以代替這個:
LayoutInflater inflater = LayoutInflater.from(MainActivity.this);
View inflatedLayout = inflater.inflate(R.layout.note_taking_layout, null, false);
linearLayout.addView(inflatedLayout);
我應該這樣做:
LayoutInflater inflater = LayoutInflater.from(MainActivity.this);
View inflatedLayout = inflater.inflate(R.layout.note_taking_layout, null, false);
inflatedLayout.setLayoutParams( // THIS!
new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.MATCH_PARENT));
linearLayout.addView(inflatedLayout);
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