Question

当用户转到该特定活动时，我想自动显示具有相同设备键盘高度的列表视图。为此，我调用了三个方法，showKeyboard（），getKeyboardHeight（）然后hideKeyboard（），然后给listview提供高度并显示listview。但问题是，一旦我调用showKeyboard（），计算高度然后hideKeyboard（），键盘就不会隐藏并保持可见。此外，我的高度为0.我无法显示该列表。在下面的代码中是否还有其他进程可以获得键盘高度或任何校正？请参阅以下代码：

showKeyboard（）方法 -

private void showKeyboard() {
             InputMethodManager keyboard = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
             keyboard.showSoftInput(editChatBox, 0);
        }

getKeyboardHeight（）方法 -

public int getKeyboardHeight() {
          final View rootview = this.getWindow().getDecorView();
           linearChatLayout.getViewTreeObserver().addOnGlobalLayoutListener(
                new ViewTreeObserver.OnGlobalLayoutListener() {
                    public void onGlobalLayout() {
                        Rect r = new Rect();
                        rootview.getWindowVisibleDisplayFrame(r);
                        int screenHeight = rootview.getRootView().getHeight();
                        int newHeight = screenHeight - (r.bottom - r.top);
                        if (newHeight > heightOfKeyboard) {
                            heightOfKeyboard = screenHeight
                                    - (r.bottom - r.top);
                            // heightOfKeyboard = heightDiff;
                        }

                        Log.d("Keyboard Size", "Size: " + heightOfKeyboard);
                    }
                });
        return heightOfKeyboard;
    }

hideKeyboard（）方法 -

private void hidekeyBoard() {
            InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
            imm.hideSoftInputFromWindow(editChatBox.getWindowToken(), 0);
}

在onCreate（）方法中 -

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

   ArrayAdapter<String> chatQueAdapter = new ArrayAdapter<>(this,
            R.layout.chat_que_row, R.id.textChatQue, queArrays);
    myListView.setAdapter(chatQueAdapter);

        showKeyboard();
        heightOfKeyboard = getKeyboardHeight();
        hidekeyBoard();
        myListView.getLayoutParams().height = heightOfKeyboard;
        myListView.setVisibility(View.VISIBLE);
    }

Answer 1

我在根视图上添加了全局布局，并且我能够将列表视图的大小调整为与键盘相同的大小。

Pink Box是调整大小的ListView。我在2台三星设备上测试了这个示例应用程序，它在两者上运行良好。

布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <EditText
        android:id="@+id/edt"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:focusable="true"
        android:focusableInTouchMode="true"
        android:inputType="text"
        android:maxLines="1" />

    <ListView
        android:id="@+id/list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/colorAccent"
        android:visibility="gone" />
</LinearLayout>

活动类

import android.graphics.Rect;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.util.TypedValue;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;

import com.fet.minebeta.R;

public class ListActivity extends AppCompatActivity {

    PagerAdapter adapterViewPager;
    ViewPager viewPager;
    private int heightDiff;
    private ListView myListView;
    private EditText editChatBox;

    private boolean wasOpened;
    private final int DefaultKeyboardDP = 100;
    // Lollipop includes button bar in the root. Add height of button bar (48dp) to maxDiff
    private final int EstimatedKeyboardDP = DefaultKeyboardDP + (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP ? 48 : 0);

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

        myListView = (ListView) findViewById(R.id.list);
        editChatBox = (EditText) findViewById(R.id.edt);

        //Listen for keyboard height change
        setKeyboardListener();

//        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);
//        editChatBox.requestFocus();
//        inputMethodManager.showSoftInput(editChatBox, 0);
//
//        if (getCurrentFocus() != null) {
//            inputMethodManager = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);
//            inputMethodManager.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), 0);
//        }
//
//        getWindow().setSoftInputMode(
//                WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN
//        );
    }


    public final void setKeyboardListener() {

        final View activityRootView = ((ViewGroup) findViewById(android.R.id.content)).getChildAt(0);

        activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {

            private final Rect r = new Rect();

            @Override
            public void onGlobalLayout() {
                // Convert the dp to pixels.
                int estimatedKeyboardHeight = (int) TypedValue
                        .applyDimension(TypedValue.COMPLEX_UNIT_DIP, EstimatedKeyboardDP, activityRootView.getResources().getDisplayMetrics());

                // Conclude whether the keyboard is shown or not.
                activityRootView.getWindowVisibleDisplayFrame(r);
                heightDiff = activityRootView.getRootView().getHeight() - (r.bottom - r.top);
                boolean isShown = heightDiff >= estimatedKeyboardHeight;

                if (isShown == wasOpened) {
                    Log.d("Keyboard state", "Ignoring global layout change...");
                    return;
                }

                wasOpened = isShown;

                if (isShown) {

                    //Set listview height
                    ViewGroup.LayoutParams params = myListView.getLayoutParams();
                    params.height = heightDiff;
                    myListView.setLayoutParams(params);
                    myListView.requestLayout();
                    myListView.setVisibility(View.VISIBLE);

                    Toast.makeText(ListActivity.this, "KeyBoard Open with height " + heightDiff +
                            "\n List View Height " + myListView.getHeight(), Toast.LENGTH_SHORT).show();

                }
            }
        });
    }
}

再次，这只是一个快速演示，您可以根据需要增强功能。

Answer 2

据我所知，没有完美的解决方案可以随时使用。我见过很多人使用ViewTreeObserver来获得键盘高度，虽然这有时不起作用，但总比没有好。 Try it out

几年前我写了一个输入法编辑器。我记得，没有从IME类中暴露出名为“getCurrentHeight”的函数。所以不要这样走。

请注意，现在很多IME支持在运行时更改键盘高度（当它显示在屏幕上时），也许你必须考虑到这一点。

Answer 3

使用OnGlobalLayoutListener获取键盘高度或实现上面的代码段

chatRootLayout是您的xml根布局将此rootLayout作为checkKeyboardHeight

中的parentLayout参数传递

    private void checkKeyboardHeight(final View parentLayout)
{
  chatRootLayout.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() 
  {
        @Override
        public void onGlobalLayout() 
        {
                Rect r = new Rect();

                chatRootLayout.getWindowVisibleDisplayFrame(r);

                int screenHeight = chatRootLayout.getRootView().getHeight();
                int keyboardHeight = screenHeight - (r.bottom);

                if (previousHeightDiffrence - keyboardHeight > 50) 
                {                           
                    // Do some stuff here
                }

                previousHeightDiffrence = keyboardHeight;
                if (keyboardHeight> 100) 
                {
                    isKeyBoardVisible = true;
                    changeKeyboardHeight(keyboardHeight);
                } 
                else
                {
                    isKeyBoardVisible = false;
                }
            }
    });
}

keyboardHeight（）方法： -

   private void changeKeyboardHeight(int height) 
{
    if (height > 100) 
    {
            keyboardHeight = height;
            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, keyboardHeight);
            yourLayout.setLayoutParams(params);
    }
}

Answer 4

请检查此KeyBoard，此应用已使用RelativeLayout onSize更改了https://github.com/w446108264/XhsEmoticonsKeyboard

Answer 5

我已经通过使用自定义传递计算出高度然后计算它

private int keyboardHeight;

// passed here 230dp
final float popUpheight = getResources().getDimension(
            R.dimen.keyboard_height);
    changeKeyboardHeight((int) popUpheight);

// call this where you want height of keyboard
checkKeyboardHeight();

int previousHeightDiffrence = 0;

private void checkKeyboardHeight() {

    rootlayout.getViewTreeObserver().addOnGlobalLayoutListener(
            new ViewTreeObserver.OnGlobalLayoutListener() {

                @Override
                public void onGlobalLayout() {

                    Rect r = new Rect();
                    rootlayout.getWindowVisibleDisplayFrame(r);
                    int screenHeight = rootlayout.getRootView()
                            .getHeight();
                    int heightDifference = screenHeight - (r.bottom);

                    if (Math.abs(previousHeightDiffrence - heightDifference) > 50) {
                        popupWindow.dismiss();
                        imageEmoji
                                .setImageResource(R.drawable.emoji_btn_normal);
                    }

                    previousHeightDiffrence = heightDifference;
                    if (heightDifference > 100) {
                        isKeyBoardVisible = true;
                        changeKeyboardHeight(heightDifference);
                    } else {
                        isKeyBoardVisible = false;
                    }

                }
            });
}


/**
 * change height of emoticons keyboard according to height of actual
 * keyboard
 *
 * @param height minimum height by which we can make sure actual keyboard is
 *               open or not
 */
private void changeKeyboardHeight(int height) {

    if (height > 100) {
        keyboardHeight = height;
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                LayoutParams.MATCH_PARENT, keyboardHeight);
        emoticonsCover.setLayoutParams(params);
    }

}

了解详情here，希望这能帮到你

在android

5 个答案: