5种方法完美解决android软键盘挡住输入框方法详解

 <activity android:name=".TestInputActivity"
  android:windowSoftInputMode="adjustPan">

 <activity android:name=".TestInputActivity"
  android:windowSoftInputMode="adjustResize">

<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"
 android:id="@+id/main"
 tools:context="com.example.liubin1.softkeyboardhelper.MainActivity">
 <EditText
 android:id="@+id/name"
 android:hint="请输入用户名："
 android:layout_centerInParent="true"
 android:layout_width="match_parent"
 android:layout_height="50dp"
 />
 <EditText
 android:id="@+id/pas"
 android:layout_below="@id/name"
 android:hint="请输入密码："
 android:layout_centerInParent="true"
 android:layout_width="match_parent"
 android:layout_height="50dp"
 />
 <Button
 android:id="@+id/login_btn"
 android:layout_below="@id/rpas"
 android:layout_centerHorizontal="true"
 android:text="登录"
 android:layout_width="180dp"
 android:layout_height="50dp" />
</RelativeLayout>

RelativeLayout main = (RelativeLayout) findViewById(R.id.main);

Button login_btn = (Button) findViewById(R.id.login_btn);

//在Activity的onCreate里添加如下方法addLayoutListener(main,login_btn);/** 
 * addLayoutListener方法如下
 * @param main 根布局
 * @param scroll 需要显示的最下方View
 */
 public void addLayoutListener(final View main, final View scroll) {
 main.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {  @Override
  public void onGlobalLayout() {
  Rect rect = new Rect();  //1、获取main在窗体的可视区域
  main.getWindowVisibleDisplayFrame(rect);  //2、获取main在窗体的不可视区域高度，在键盘没有弹起时，main.getRootView().getHeight()调节度应该和rect.bottom高度一样
  int mainInvisibleHeight = main.getRootView().getHeight() - rect.bottom;  int screenHeight = main.getRootView().getHeight();//屏幕高度
  //3、不可见区域大于屏幕本身高度的1/4：说明键盘弹起了
  if (mainInvisibleHeight > screenHeight / 4) {   int[] location = new int[2];
   scroll.getLocationInWindow(location);   // 4､获取Scroll的窗体坐标，算出main需要滚动的高度
   int srollHeight = (location[1] + scroll.getHeight()) - rect.bottom;   //5､让界面整体上移键盘的高度
   main.scrollTo(0, srollHeight);
  } else {  //3、不可见区域小于屏幕高度1/4时,说明键盘隐藏了，把界面下移，移回到原有高度
   main.scrollTo(0, 0);
  }
  }
 });
 }
}

public class KeyboardLayout extends FrameLayout {
 private KeyboardLayoutListener mListener; private boolean mIsKeyboardActive = false; //输入法是否激活
 private int mKeyboardHeight = 0; // 输入法高度
 public KeyboardLayout(Context context) { this(context, null, 0);
 } public KeyboardLayout(Context context, AttributeSet attrs) { this(context, attrs, 0);
 } public KeyboardLayout(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); // 监听布局变化
 getViewTreeObserver().addOnGlobalLayoutListener(new KeyboardOnGlobalChangeListener());
 } public void setKeyboardListener(KeyboardLayoutListener listener) {
 mListener = listener;
 } public KeyboardLayoutListener getKeyboardListener() { return mListener;
 } public boolean isKeyboardActive() { return mIsKeyboardActive;
 } /**
 * 获取输入法高度
 *
 * @return
 */
 public int getKeyboardHeight() { return mKeyboardHeight;
 } public interface KeyboardLayoutListener {
 /**
  * @param isActive 输入法是否激活
  * @param keyboardHeight 输入法面板高度
  */
 void onKeyboardStateChanged(boolean isActive, int keyboardHeight);
 } private class KeyboardOnGlobalChangeListener implements ViewTreeObserver.OnGlobalLayoutListener {
 int mScreenHeight = 0; private int getScreenHeight() {  if (mScreenHeight > 0) {  return mScreenHeight;
  }
  mScreenHeight = ((WindowManager) getContext().getSystemService(Context.WINDOW_SERVICE))
   .getDefaultDisplay().getHeight();  return mScreenHeight;
 } @Override
 public void onGlobalLayout() {
  Rect rect = new Rect();  // 获取当前页面窗口的显示范围
  ((Activity) getContext()).getWindow().getDecorView().getWindowVisibleDisplayFrame(rect);  int screenHeight = getScreenHeight();  int keyboardHeight = screenHeight - rect.bottom; // 输入法的高度
  boolean isActive = false;  if (Math.abs(keyboardHeight) > screenHeight / 4) {
  isActive = true; // 超过屏幕五分之一则表示弹出了输入法
  mKeyboardHeight = keyboardHeight;
  }
  mIsKeyboardActive = isActive;  if (mListener != null) {
  mListener.onKeyboardStateChanged(isActive, keyboardHeight);
  }
 }
 }
}

public class KeyboardLayout extends FrameLayout {
 private KeyboardLayoutListener mListener; private boolean mIsKeyboardActive = false; //输入法是否激活
 private int mKeyboardHeight = 0; // 输入法高度
 public KeyboardLayout(Context context) { this(context, null, 0);
 } public KeyboardLayout(Context context, AttributeSet attrs) { this(context, attrs, 0);
 } public KeyboardLayout(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); // 监听布局变化
 getViewTreeObserver().addOnGlobalLayoutListener(new KeyboardOnGlobalChangeListener());
 } public void setKeyboardListener(KeyboardLayoutListener listener) {
 mListener = listener;
 } public KeyboardLayoutListener getKeyboardListener() { return mListener;
 } public boolean isKeyboardActive() { return mIsKeyboardActive;
 } /**
 * 获取输入法高度
 *
 * @return
 */
 public int getKeyboardHeight() { return mKeyboardHeight;
 } public interface KeyboardLayoutListener {
 /**
  * @param isActive 输入法是否激活
  * @param keyboardHeight 输入法面板高度
  */
 void onKeyboardStateChanged(boolean isActive, int keyboardHeight);
 } private class KeyboardOnGlobalChangeListener implements ViewTreeObserver.OnGlobalLayoutListener {
 int mScreenHeight = 0; private int getScreenHeight() {  if (mScreenHeight > 0) {  return mScreenHeight;
  }
  mScreenHeight = ((WindowManager) getContext().getSystemService(Context.WINDOW_SERVICE))
   .getDefaultDisplay().getHeight();  return mScreenHeight;
 } @Override
 public void onGlobalLayout() {
  Rect rect = new Rect();  // 获取当前页面窗口的显示范围
  ((Activity) getContext()).getWindow().getDecorView().getWindowVisibleDisplayFrame(rect);  int screenHeight = getScreenHeight();  int keyboardHeight = screenHeight - rect.bottom; // 输入法的高度
  boolean isActive = false;  if (Math.abs(keyboardHeight) > screenHeight / 4) {
  isActive = true; // 超过屏幕五分之一则表示弹出了输入法
  mKeyboardHeight = keyboardHeight;
  }
  mIsKeyboardActive = isActive;  if (mListener != null) {
  mListener.onKeyboardStateChanged(isActive, keyboardHeight);
  }
 }
 }
}

 /**
 * 监听键盘状态，布局有变化时，靠scrollView去滚动界面
 */
 public void addLayoutListener() {
 bindingView.mainLl.setKeyboardListener(new KeyboardLayout.KeyboardLayoutListener() {  @Override
  public void onKeyboardStateChanged(boolean isActive, int keyboardHeight) {
  Log.e("onKeyboardStateChanged", "isActive:" + isActive + " keyboardHeight:" + keyboardHeight);  if (isActive) {
   scrollToBottom();
  }
  }
 });
 } /**
 * 弹出软键盘时将SVContainer滑到底
 */
 private void scrollToBottom() {
 bindingView.loginLl.postDelayed(new Runnable() {  @Override
  public void run() {
  bindingView.loginLl.smoothScrollTo(0, bindingView.loginLl.getBottom() + SoftKeyInputHidWidget.getStatusBarHeight(LoginActivityForDiffkeyboardHeight.this));
  }
 }, 100);
 }

/**
 * 解决键盘档住输入框
 * Created by SmileXie on 2017/4/3.
 */public class SoftHideKeyBoardUtil {
 public static void assistActivity (Activity activity) { new SoftHideKeyBoardUtil(activity);
 } private View mChildOfContent; private int usableHeightPrevious; private FrameLayout.LayoutParams frameLayoutParams; //为适应华为小米等手机键盘上方出现黑条或不适配
 private int contentHeight;//获取setContentView本来view的高度
 private boolean isfirst = true;//只用获取一次
 private int statusBarHeight;//状态栏高度
 private SoftHideKeyBoardUtil(Activity activity) { //1､找到Activity的最外层布局控件，它其实是一个DecorView,它所用的控件就是FrameLayout
 FrameLayout content = (FrameLayout) activity.findViewById(android.R.id.content); //2､获取到setContentView放进去的View
 mChildOfContent = content.getChildAt(0); //3､给Activity的xml布局设置View树监听，当布局有变化，如键盘弹出或收起时，都会回调此监听 
  mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() { //4､软键盘弹起会使GlobalLayout发生变化
  public void onGlobalLayout() {  if (isfirst) {
   contentHeight = mChildOfContent.getHeight();//兼容华为等机型
   isfirst = false;
  }  //5､当前布局发生变化时，对Activity的xml布局进行重绘
  possiblyResizeChildOfContent();
  }
 }); //6､获取到Activity的xml布局的放置参数
 frameLayoutParams = (FrameLayout.LayoutParams) mChildOfContent.getLayoutParams();
 } // 获取界面可用高度，如果软键盘弹起后，Activity的xml布局可用高度需要减去键盘高度 
 private void possiblyResizeChildOfContent() { //1､获取当前界面可用高度，键盘弹起后，当前界面可用布局会减少键盘的高度
 int usableHeightNow = computeUsableHeight(); //2､如果当前可用高度和原始值不一样
 if (usableHeightNow != usableHeightPrevious) {  //3､获取Activity中xml中布局在当前界面显示的高度
  int usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight();  //4､Activity中xml布局的高度-当前可用高度
  int heightDifference = usableHeightSansKeyboard - usableHeightNow;  //5､高度差大于屏幕1/4时，说明键盘弹出
  if (heightDifference > (usableHeightSansKeyboard/4)) {  // 6､键盘弹出了，Activity的xml布局高度应当减去键盘高度
  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT){
   frameLayoutParams.height = usableHeightSansKeyboard - heightDifference + statusBarHeight;
  } else {
   frameLayoutParams.height = usableHeightSansKeyboard - heightDifference;
  }
  } else {
  frameLayoutParams.height = contentHeight;
  }  //7､ 重绘Activity的xml布局
  mChildOfContent.requestLayout();
  usableHeightPrevious = usableHeightNow;
 }
 } private int computeUsableHeight() {
 Rect r = new Rect();
 mChildOfContent.getWindowVisibleDisplayFrame(r); // 全屏模式下：直接返回r.bottom，r.top其实是状态栏的高度
 return (r.bottom - r.top);
 }
}

FrameLayout content = (FrameLayout) activity.findViewById(android.R.id.content);

mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener({ 
 possiblyResizeChildOfContent();
});

private int computeUsableHeight() {
 Rect rect = new Rect();
 mChildOfContent.getWindowVisibleDisplayFrame(rect); // rect.top其实是状态栏的高度，如果是全屏主题，直接 return rect.bottom就可以了
 return (rect.bottom - rect.top);
}

android:windowSoftInputMode="stateHidden|adjustPan"