|
|
package com.stu.assistant.uitls;
|
|
|
|
|
|
import android.app.Activity;
|
|
|
import android.graphics.Rect;
|
|
|
import android.os.Build;
|
|
|
import android.view.View;
|
|
|
import android.view.ViewTreeObserver;
|
|
|
import android.widget.FrameLayout;
|
|
|
|
|
|
/**
|
|
|
* 解决沉浸式状态栏下 输入框不顶上去的冲突
|
|
|
* 实现顶部状态栏沉浸式后，点击底部自定义的输入框，弹出软键盘后，输入框被遮挡
|
|
|
* */
|
|
|
public class ChenJingEditUil {
|
|
|
|
|
|
public static void assistActivity(Activity activity) {
|
|
|
new ChenJingEditUil(activity);
|
|
|
}
|
|
|
|
|
|
private Activity activity;
|
|
|
private View mChildOfContent;
|
|
|
private int usableHeightPrevious;
|
|
|
private FrameLayout.LayoutParams frameLayoutParams;
|
|
|
private int contentHeight;//获取setContentView本来view的高度
|
|
|
private boolean isfirst = true;//只用获取一次
|
|
|
private int statusBarHeight;//状态栏高度
|
|
|
|
|
|
private ChenJingEditUil(Activity activity) {
|
|
|
this.activity = activity;
|
|
|
//1､找到Activity的最外层布局控件，它其实是一个DecorView,它所用的控件就是FrameLayout
|
|
|
FrameLayout content = (FrameLayout) activity.findViewById(android.R.id.content);
|
|
|
//2､获取到setContentView放进去的View
|
|
|
mChildOfContent = content.getChildAt(0);
|
|
|
//3､给Activity的xml布局设置View树监听，当布局有变化，如键盘弹出或收起时，都会回调此监听
|
|
|
mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
|
|
|
//4､软键盘弹起会使GlobalLayout发生变化
|
|
|
public void onGlobalLayout() {
|
|
|
if (isfirst) {
|
|
|
contentHeight = mChildOfContent.getHeight();//兼容华为等机型
|
|
|
isfirst = false;
|
|
|
}
|
|
|
//5､当前布局发生变化时，对Activity的xml布局进行重绘
|
|
|
possiblyResizeChildOfContent();
|
|
|
}
|
|
|
});
|
|
|
//6､获取到Activity的xml布局的放置参数
|
|
|
frameLayoutParams = (FrameLayout.LayoutParams) mChildOfContent.getLayoutParams();
|
|
|
}
|
|
|
|
|
|
// 获取界面可用高度，如果软键盘弹起后，Activity的xml布局可用高度需要减去键盘高度
|
|
|
private void possiblyResizeChildOfContent() {
|
|
|
//1､获取当前界面可用高度，键盘弹起后，当前界面可用布局会减少键盘的高度
|
|
|
int usableHeightNow = computeUsableHeight(activity);
|
|
|
//2､如果当前可用高度和原始值不一样
|
|
|
if (usableHeightNow != usableHeightPrevious) {
|
|
|
//3､获取Activity中xml中布局在当前界面显示的高度
|
|
|
int usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight();
|
|
|
//4､Activity中xml布局的高度-当前可用高度
|
|
|
int heightDifference = usableHeightSansKeyboard - usableHeightNow;
|
|
|
//5､高度差大于屏幕1/4时，说明键盘弹出
|
|
|
if (heightDifference > (usableHeightSansKeyboard / 4)) {
|
|
|
// 6､键盘弹出了，Activity的xml布局高度应当减去键盘高度
|
|
|
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
|
|
|
frameLayoutParams.height = usableHeightSansKeyboard - heightDifference + statusBarHeight;
|
|
|
} else {
|
|
|
frameLayoutParams.height = usableHeightSansKeyboard - heightDifference;
|
|
|
}
|
|
|
|
|
|
} else {
|
|
|
frameLayoutParams.height=contentHeight;
|
|
|
|
|
|
}
|
|
|
//7､ 重绘Activity的xml布局
|
|
|
mChildOfContent.requestLayout();
|
|
|
usableHeightPrevious = usableHeightNow;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
private int computeUsableHeight(Activity activity) {
|
|
|
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）之间有白色区域的问题
|
|
|
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
|
|
|
return (r.bottom - r.top) + statusBarHeight;
|
|
|
}
|
|
|
return (r.bottom - r.top);
|
|
|
}
|
|
|
|
|
|
}
|
