今天就跟大家聊聊有关Android项目中怎么显示与隐藏软键盘，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。
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代码如下：
import android.app.Activity;
import android.content.Context;
import android.graphics.Rect;
import android.os.Build;
import android.util.Log;
import android.util.TypedValue;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
/**
*
* 软键盘的监听
*/
public class KeyBoardShowListener {
private Context ctx;
public KeyBoardShowListener(Context ctx) {
this.ctx = ctx;
}
OnKeyboardVisibilityListener keyboardListener;
public OnKeyboardVisibilityListener getKeyboardListener() {
return keyboardListener;
}
public interface OnKeyboardVisibilityListener {
void onVisibilityChanged(boolean visible);
}
public void setKeyboardListener(final OnKeyboardVisibilityListener listener, Activity activity) {
final View activityRootView = ((ViewGroup) activity.findViewById(android.R.id.content)).getChildAt(0);
activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
private boolean wasOpened;
private final int DefaultKeyboardDP = 100;
// From @nathanielwolf answer... 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);
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);
int heightDiff = activityRootView.getRootView().getHeight() - (r.bottom - r.top);
boolean isShown = heightDiff >= estimatedKeyboardHeight;
if (isShown == wasOpened) {
Log.e("Keyboard state", "Ignoring global layout change...");
return;
}
wasOpened = isShown;
listener.onVisibilityChanged(isShown);
}
});
}
}用法如下：
//监听软键盘的状态
new KeyBoardShowListener(Activity.this).setKeyboardListener(
new KeyBoardShowListener.OnKeyboardVisibilityListener() {
@Override
public void onVisibilityChanged(boolean visible) {
if (visible) {
//软键盘已弹出
} else {
//软键盘未弹出
}
}
}, Activity.this);以下是可能会遇到的一些情况：
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);
去除软键盘显示：
editMsgView.setText("");
editMsgView.clearFocus();
//close InputMethodManager
InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(editMsgView.getWindowToken(), 0);始终不弹出软件键盘
复制代码 代码如下:
EditText edit=(EditText)findViewById(R.id.edit); edit.setInputType(InputType.TYPE_NULL);
也可以：
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 );
}看完上述内容，你们对Android项目中怎么显示与隐藏软键盘有进一步的了解吗？如果还想了解更多知识或者相关内容，请关注创新互联行业资讯频道，感谢大家的支持。
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