android 软键盘的弹出问题总结

项目中用到软键盘的管理总结如下：

在开始进入页面时不弹出键盘

方法一：在包含EditText外层布局上添加

android:focusable="true"android:focusableInTouchMode="true"

抢在EditText获取焦点，即可

原理 view touch source：

public boolean onTouchEvent(MotionEvent event) {    ...    if (((viewFlags & CLICKABLE) == CLICKABLE ||         (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE)) {        ...        if (isFocusable() && isFocusableInTouchMode()            && !isFocused()) {                focusTaken = requestFocus();        }        ...    }    ...}

即一个子view想要获取焦点必须满足clickable, focusable, focusableInTouchMode 属性为true，缺一不可.

方法二：在onResume中加入这行代码

getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE |                WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN);

软键盘出现把原来的布局底部拦布局给顶上去的方法解决办法:

android:windowSoftInputMode="adjustPan|stateHidden"

1,绑定软键盘到EditText：

edit.setFocusable(true);edit.setFocusableInTouchMode(true);edit.requestFocus();InputMethodManager inputManager = (InputMethodManager)edit.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);        inputManager.showSoftInput(edit, 0);

2，点击空白区域去除EditText软键盘显示：

重写Activity dispatchTouch

@Overridepublic boolean dispatchTouchEvent(MotionEvent event) {    if (event.getAction() == MotionEvent.ACTION_DOWN) {        View v = getCurrentFocus();        if ( v instanceof EditText) {            Rect outRect = new Rect();            v.getGlobalVisibleRect(outRect);            if (!outRect.contains((int)event.getRawX(), (int)event.getRawY())) {                v.clearFocus();                InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);                imm.hideSoftInputFromWindow(v.getWindowToken(), 0);            }        }    }    return super.dispatchTouchEvent( event );}

EditText始终不弹出软件键盘

EditText edit=(EditText)findViewById(R.id.edit); edit.setInputType(InputType.TYPE_NULL);

还可以

InputMethodManager imm = (InputMethodManager)v.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);   　　if(imm.isActive()){   //这里可以判断也可以不判断　　　　imm.hideSoftInputFromWindow(v.getApplicationWindowToken(), 0 );   　　}   

1，在设置软键盘弹出属性界面加载后,软键盘不能弹出，不能弹出软键盘的主要原因是Android程序未将屏幕绘制完成,所以延迟一定时间，弹出软键盘。

方法一：

private Handler hander=new Handler(){public void handleMessage(android.os.Message msg) {edit.setFocusable(true);edit.setFocusableInTouchMode(true);edit.requestFocus();InputMethodManager inputManager = (InputMethodManager)edit.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);        inputManager.showSoftInput(edit, 0);};};

@Overridepublic void onWindowFocusChanged(boolean hasWindowFocus) {if(visible){hander.sendEmptyMessageDelayed(0, 1000);}}

方法二：

Timer timer = new Timer();timer.schedule(new TimerTask() {@Overridepublic void run() {InputMethodManager m = (InputMethodManager) editText.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);m.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);}}, 300);

<activity android:windowSoftInputMode="stateVisible|adjustResize" . . . >
 该Activity主窗口总是被调整屏幕的大小以便留出软键盘的空间

软键盘打开，关闭监控：来源girhub:

import android.app.Activity;import android.os.Build;import android.view.View;import android.view.ViewTreeObserver;import android.view.Window;import android.view.WindowManager;import java.lang.ref.WeakReference;/** * Created by froger_mcs on 21/03/16. */public class KeyboardWatcher {    private WeakReference<Activity> activityRef;    private WeakReference<View> rootViewRef;    private WeakReference<OnKeyboardToggleListener> onKeyboardToggleListenerRef;    private ViewTreeObserver.OnGlobalLayoutListener viewTreeObserverListener;    public KeyboardWatcher(Activity activity) {        activityRef = new WeakReference<>(activity);        initialize();    }    public void setListener(OnKeyboardToggleListener onKeyboardToggleListener) {        onKeyboardToggleListenerRef = new WeakReference<>(onKeyboardToggleListener);    }    public void destroy() {        if (rootViewRef.get() != null)            if (Build.VERSION.SDK_INT >= 16) {                rootViewRef.get().getViewTreeObserver().removeOnGlobalLayoutListener(viewTreeObserverListener);            } else {                rootViewRef.get().getViewTreeObserver().removeGlobalOnLayoutListener(viewTreeObserverListener);            }    }    private void initialize() {        if (hasAdjustResizeInputMode()) {            viewTreeObserverListener = new GlobalLayoutListener();            rootViewRef = new WeakReference<>(activityRef.get().findViewById(Window.ID_ANDROID_CONTENT));            rootViewRef.get().getViewTreeObserver().addOnGlobalLayoutListener(viewTreeObserverListener);        } else {            throw new IllegalArgumentException(String.format("Activity %s should have windowSoftInputMode=\"adjustResize\"" +                    "to make KeyboardWatcher working. You can set it in AndroidManifest.xml", activityRef.get().getClass().getSimpleName()));        }    }    private boolean hasAdjustResizeInputMode() {        return (activityRef.get().getWindow().getAttributes().softInputMode & WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE) != 0;    }    private class GlobalLayoutListener implements ViewTreeObserver.OnGlobalLayoutListener {        int initialValue;        boolean hasSentInitialAction;        boolean isKeyboardShown;        @Override        public void onGlobalLayout() {            if (initialValue == 0) {                initialValue = rootViewRef.get().getHeight();            } else {                if (initialValue > rootViewRef.get().getHeight()) {                    if (onKeyboardToggleListenerRef.get() != null) {                        if (!hasSentInitialAction || !isKeyboardShown) {                            isKeyboardShown = true;                            onKeyboardToggleListenerRef.get().onKeyboardShown(initialValue - rootViewRef.get().getHeight());                        }                    }                } else {                    if (!hasSentInitialAction || isKeyboardShown) {                        isKeyboardShown = false;                        rootViewRef.get().post(new Runnable() {                            @Override                            public void run() {                                if (onKeyboardToggleListenerRef.get() != null) {                                    onKeyboardToggleListenerRef.get().onKeyboardClosed();                                }                            }                        });                    }                }                hasSentInitialAction = true;            }        }    }    public interface OnKeyboardToggleListener {        void onKeyboardShown(int keyboardSize);        void onKeyboardClosed();    }}

使用监控：

<activity
    android:name=".MainActivity"
    android:windowSoftInputMode="adjustResize" />
    
   keyboardWatcher = new KeyboardWatcher(this);
  keyboardWatcher.setListener(this);