Android edittext 键盘 弹出问题总结

项目中用到软键盘的管理总结如下：

一、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);

二、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"

二·二、软键盘出现 覆盖原来的布局：

<activity
android:name=".MainActivity"
android:label="@string/app_name"
android:screenOrientation="portrait"
android:theme="@android:style/Theme.Holo.Light.NoActionBar"
android:windowSoftInputMode="stateVisible|adjustResize|adjustPan" >
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

@Override
public 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 );
}

仨、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);
};
};

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

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

方法二：

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

清单文件：

< 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

三、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();
}
}

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);