欢迎来到 Android人的问与答 ,在这里提问或帮助他人解答。 Question2Answer的1.6.x和1.7.x版本的中文翻译包我修改更新:

Question2answer

如何使用中文语言包

Q2A 1.6.x - Chinese Simplified (简体中文)

Q2A 1.7.x - Chinese Simplified (简体中文)


国内服务器推荐 阿里云服务器
国外服务器推荐 DigitalOcean
VPN推荐 正版Green VPN
阿里云推荐码:ldvq50

如何检测Android中软键盘是否打开?

0 喜欢 0 不喜欢
161 浏览

方案一:

在manifest中添加android:windowSoftInputMode="adjustResize"到Activity的声明中。

在Activity的根view加上id,例如:@+id/activityRoot。Activity中写上代码:

final View activityRootView = findViewById(R.id.activityRoot);
activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
    @Override
    public void onGlobalLayout() {
        int heightDiff = activityRootView.getRootView().getHeight() - activityRootView.getHeight();
        if (heightDiff > 100) { // if more than 100 pixels, its probably a keyboard...
            ... do something here
        }
     }
});

方案二:

定一个接口,并复写根view的onMeasure()方法,例如:

/*
 * LinearLayoutThatDetectsSoftKeyboard - a variant of LinearLayout that can detect when
 * the soft keyboard is shown and hidden (something Android can't tell you, weirdly).
 */

public class LinearLayoutThatDetectsSoftKeyboard extends LinearLayout {

    public LinearLayoutThatDetectsSoftKeyboard(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public interface Listener {
        public void onSoftKeyboardShown(boolean isShowing);
    }
    private Listener listener;
    public void setListener(Listener listener) {
        this.listener = listener;
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int height = MeasureSpec.getSize(heightMeasureSpec);
        Activity activity = (Activity)getContext();
        Rect rect = new Rect();
        activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(rect);
        int statusBarHeight = rect.top;
        int screenHeight = activity.getWindowManager().getDefaultDisplay().getHeight();
        int diff = (screenHeight - statusBarHeight) - height;
        if (listener != null) {
            listener.onSoftKeyboardShown(diff>128); // assume all soft keyboards are at least 128 pixels high
        }
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);       
    }

    }

然后在Activity中如下使用:

public class MyActivity extends Activity implements LinearLayoutThatDetectsSoftKeyboard.Listener {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ...
        LinearLayoutThatDetectsSoftKeyboard mainLayout = (LinearLayoutThatDetectsSoftKeyboard)findViewById(R.id.main);
        mainLayout.setListener(this);
        ...
    }


    @Override
    public void onSoftKeyboardShown(boolean isShowing) {
        // do whatever you need to do here
    }

    ...
}

方案三:

这个方案不需要将windowSoftInputMode设置为adjustResize。

final View activityRootView = findViewById(R.id.activityRoot);
activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
    Rect r = new Rect();
    //r will be populated with the coordinates of your view that area still visible.
    activityRootView.getWindowVisibleDisplayFrame(r);

    int heightDiff = activityRootView.getRootView().getHeight() - (r.bottom - r.top);
    if (heightDiff > 100) { // if more than 100 pixels, its probably a keyboard...
        ... do something here
    }
 }
});

 

 

 
最新提问 12月 31, 2014 分类:Android 小技巧 | 用户: forlong401 (7,050 分)

登录 或者 注册 后回答这个问题。

...