如何在显示 android 键盘时隐藏某些视图？

Question

我正在尝试编写代码以在显示 Android 键盘时隐藏某些 ui 元素，我试图在清单中添加 "adjustResize" 但它重新调整了元素的大小自动但不隐藏布局中的某些视图。

我的代码：

package com.example.code;

import android.app.Activity;
import android.os.Bundle;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

}
@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);


    // Checks whether a hardware keyboard is available
    if (newConfig.hardKeyboardHidden == Configuration.HARDKEYBOARDHIDDEN_NO) {
        Toast.makeText(this, "keyboard visible", Toast.LENGTH_SHORT).show();
    } else if (newConfig.hardKeyboardHidden == Configuration.HARDKEYBOARDHIDDEN_YES) {
        Toast.makeText(this, "keyboard hidden", Toast.LENGTH_SHORT).show();
    } else {
        Toast.makeText(this, "No above", Toast.LENGTH_SHORT).show();
    }
}  }

XML :

<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"
tools:context="com.example.MainActivity">
<ScrollView
    android:id="@+id/scroll"
    android:layout_width="wrap_content"
    android:layout_height="300dp">
    <ImageView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:src="@drawable/image_back"/>
</ScrollView>

<TextView
    android:id="@+id/xyz"
    android:layout_width="fill_parent"
    android:layout_height="65dp"
    android:layout_alignParentBottom="true"
    android:background="@android:color/holo_orange_dark"
    android:gravity="center_horizontal"
    android:text="Test Layout"
    android:textSize="40sp" />

<EditText
    android:id="@+id/abc"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_above="@+id/xyz"
    android:layout_alignParentLeft="true"
    android:background="@android:color/holo_blue_bright"
    android:ems="10"
    android:gravity="center_horizontal"
    android:text="Please enter text"
    android:textSize="40sp" >

    <requestFocus />
</EditText>

清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.code"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="14"
    android:targetSdkVersion="21" />


<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.example.code.MainActivity"
        android:windowSoftInputMode="adjustResize"
        android:label="@string/app_name" 
        android:configChanges="orientation|screenSize|keyboardHidden">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

截图：

所以，这些是我的应用程序的代码和屏幕截图，所以我想在键盘打开时隐藏“测试布局”文本视图。所以，请为我的问题建议一些技术和解决方案。

Answer 1

您可以尝试这样的操作，并根据键盘的可见性更新布局的可见性。

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);


    // Checks whether a hardware keyboard is available
    if (newConfig.hardKeyboardHidden == Configuration.HARDKEYBOARDHIDDEN_NO) {
        Toast.makeText(this, "keyboard visible", Toast.LENGTH_SHORT).show();
    } else if (newConfig.hardKeyboardHidden == Configuration.HARDKEYBOARDHIDDEN_YES) {
        Toast.makeText(this, "keyboard hidden", Toast.LENGTH_SHORT).show();
    }
}

Answer 2

/*Hide button when keyboard is open*/
view.getViewTreeObserver().addOnGlobalLayoutListener(new 
ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
    Rect r = new Rect();
    view.getWindowVisibleDisplayFrame(r);

    int heightDiff = view.getRootView().getHeight() - (r.bottom - r.top);

    if (heightDiff > 244) { // if more than 100 pixels, its probably a keyboard...
        //ok now we know the keyboard is up...
        buttonLayout.setVisibility(View.GONE);


    } else {
        //ok now we know the keyboard is down...
        buttonLayout.setVisibility(View.VISIBLE);


    }
}
});

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