解决Activity全屏和adjustResize的冲突
2018-07-24 本文已影响0人
周大侠侠侠侠侠侠侠侠侠侠侠侠侠
import android.app.Activity;
import android.graphics.Rect;
import android.os.Build.VERSION;
import android.os.Build.VERSION_CODES;
import android.view.View;
import android.view.ViewTreeObserver;
import android.widget.FrameLayout;
/**
* title:修复全屏状态下adjustResize的问题
* tip:在setContentView()之后调用assistActivity(Activity activity)
*
* @author zhou
* @date 2018/7/24 下午7:20
*/
public class AndroidBug5497Workaround {
// For more information, see https://code.google.com/p/android/issues/detail?id=5497
// To use this class, simply invoke assistActivity() on an Activity that already has its content view set.
public static void assistActivity(Activity activity) {
new AndroidBug5497Workaround(activity);
}
private Activity activity;
private View mChildOfContent;
private int usableHeightPrevious;
private FrameLayout.LayoutParams frameLayoutParams;
private AndroidBug5497Workaround(Activity activity) {
this.activity = activity;
FrameLayout content = (FrameLayout) activity.findViewById(android.R.id.content);
mChildOfContent = content.getChildAt(0);
mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
possiblyResizeChildOfContent();
}
});
frameLayoutParams = (FrameLayout.LayoutParams) mChildOfContent.getLayoutParams();
}
private void possiblyResizeChildOfContent() {
int usableHeightNow = computeUsableHeight();
if (usableHeightNow != usableHeightPrevious) {
int usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight();
//这个判断是为了解决19之前的版本不支持沉浸式状态栏导致布局显示不完全的问题
if (VERSION.SDK_INT < VERSION_CODES.KITKAT) {
Rect frame = new Rect();
activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
int statusBarHeight = frame.top;
usableHeightSansKeyboard -= statusBarHeight;
}
int heightDifference = usableHeightSansKeyboard - usableHeightNow;
if (heightDifference > (usableHeightSansKeyboard / 4)) {
// keyboard probably just became visible
frameLayoutParams.height = usableHeightSansKeyboard - heightDifference;
} else {
// keyboard probably just became hidden
frameLayoutParams.height = usableHeightSansKeyboard;
}
mChildOfContent.requestLayout();
usableHeightPrevious = usableHeightNow;
}
}
private int computeUsableHeight() {
Rect frame = new Rect();
activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
int statusBarHeight = frame.top;
Rect r = new Rect();
mChildOfContent.getWindowVisibleDisplayFrame(r);
//这个判断是为了解决19之后的版本在弹出软键盘时,键盘和推上去的布局(adjustResize)之间有黑色区域的问题
if (VERSION.SDK_INT >= VERSION_CODES.KITKAT) {
return (r.bottom - r.top) + statusBarHeight;
}
return (r.bottom - r.top);
}
}