Android监听软键盘,布局上移不遮挡输入框
效果图:
整体思路是监听软键盘弹出,给需要平移的布局添加属性动画(位移)
监听软键盘的状态:
public class SoftKeyBoardListener {
private View rootView;//activity的根视图
int rootViewVisibleHeight;//纪录根视图的显示高度
private OnSoftKeyBoardChangeListener onSoftKeyBoardChangeListener;
public SoftKeyBoardListener(Activity activity) {
//获取activity的根视图
rootView = activity.getWindow().getDecorView();
//监听视图树中全局布局发生改变或者视图树中的某个视图的可视状态发生改变
rootView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
//获取当前根视图在屏幕上显示的大小
Rect r = new Rect();
rootView.getWindowVisibleDisplayFrame(r);
int visibleHeight = r.height();
if (rootViewVisibleHeight == 0) {
rootViewVisibleHeight = visibleHeight;
return;
}
//根视图显示高度没有变化,可以看作软键盘显示/隐藏状态没有改变
if (rootViewVisibleHeight == visibleHeight) {
return;
}
//根视图显示高度变小超过200,可以看作软键盘显示了
if (rootViewVisibleHeight - visibleHeight > 200) {
if (onSoftKeyBoardChangeListener != null) {
onSoftKeyBoardChangeListener.keyBoardShow(rootViewVisibleHeight - visibleHeight);
}
rootViewVisibleHeight = visibleHeight;
return;
}
//根视图显示高度变大超过200,可以看作软键盘隐藏了
if (visibleHeight - rootViewVisibleHeight > 200) {
if (onSoftKeyBoardChangeListener != null) {
onSoftKeyBoardChangeListener.keyBoardHide(visibleHeight - rootViewVisibleHeight);
}
rootViewVisibleHeight = visibleHeight;
return;
}
}
});
}
private void setOnSoftKeyBoardChangeListener(OnSoftKeyBoardChangeListener onSoftKeyBoardChangeListener) {
this.onSoftKeyBoardChangeListener = onSoftKeyBoardChangeListener;
}
public interface OnSoftKeyBoardChangeListener {
void keyBoardShow(int height);
void keyBoardHide(int height);
}
public static void setListener(Activity activity, OnSoftKeyBoardChangeListener onSoftKeyBoardChangeListener) {
SoftKeyBoardListener softKeyBoardListener = new SoftKeyBoardListener(activity);
softKeyBoardListener.setOnSoftKeyBoardChangeListener(onSoftKeyBoardChangeListener);
}
}
在Activity中的使用方法:
SoftKeyBoardListener.setListener(MainActivity.this, new SoftKeyBoardListener.OnSoftKeyBoardChangeListener() { @Override public void keyBoardShow(int height) { Toast.makeText(MainActivity.this, "键盘显示 高度" + height, Toast.LENGTH_SHORT).show(); } @Override public void keyBoardHide(int height) { Toast.makeText(MainActivity.this, "键盘隐藏 高度" + height, Toast.LENGTH_SHORT).show(); } });
布局:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="sosee.mytext30.MainActivity">
<LinearLayout
android:id="@+id/ll"
android:orientation="vertical"
android:layout_centerInParent="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<EditText
android:hint="输入框1"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<EditText
android:hint="输入框2"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<EditText
android:hint="输入框3"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<EditText
android:hint="输入框4"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<EditText
android:hint="输入框5"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</RelativeLayout>
Activity代码:
public class MainActivity extends AppCompatActivity{
private LinearLayout ll;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ll = findViewById(R.id.ll);
SoftKeyBoardListener.setListener(MainActivity.this, new SoftKeyBoardListener.OnSoftKeyBoardChangeListener() {
@Override
public void keyBoardShow(int height) {
Toast.makeText(MainActivity.this, "键盘显示 高度" + height, Toast.LENGTH_SHORT).show();
//属性动画,Y移动
ObjectAnimator objectAnimator = ObjectAnimator.
ofFloat(ll,"translationY",-200);
AnimatorSet animatorSet = new AnimatorSet();
animatorSet.setDuration(200);
animatorSet.playTogether(objectAnimator);
animatorSet.start();
}
@Override
public void keyBoardHide(int height) {
Toast.makeText(MainActivity.this, "键盘隐藏 高度" + height, Toast.LENGTH_SHORT).show();
//复位
ObjectAnimator objectAnimator = ObjectAnimator.
ofFloat(ll,"translationY",0);
AnimatorSet animatorSet = new AnimatorSet();
animatorSet.setDuration(200);
animatorSet.playTogether(objectAnimator);
animatorSet.start();
}
});
}
}