Android仿微信实现评论功能

//给评论图标设置点击事件
 mIv_header_discuss.setOnClickListener(new View.OnClickListener() {
  @Override
  public void onClick(View v) {
  showPopupcomment();
  }
 });

private PopupWindow popupWindow;
private View popupView = null;
private EditText inputComment;
private String nInputContentText;
private TextView btn_submit;
private RelativeLayout rl_input_container;
private InputMethodManager mInputManager;
@SuppressLint("WrongConstant")
private void showPopupcomment() {
if (popupView == null){
//加载评论框的资源文件 
popupView = LayoutInflater.from(context).inflate(R.layout.comment_popupwindow, null);
}
inputComment = (EditText) popupView.findViewById(R.id.et_discuss);
btn_submit = (Button) popupView.findViewById(R.id.btn_confirm);
rl_input_container = (RelativeLayout)popupView.findViewById(R.id.rl_input_container);
//利用Timer这个Api设置延迟显示软键盘，这里时间为200毫秒
Timer timer = new Timer();
timer.schedule(new TimerTask() {
public void run()
{
mInputManager = (InputMethodManager)getActivity().getSystemService(Context.INPUT_METHOD_SERVICE);
mInputManager.showSoftInput(inputComment, 0);
}
}, 200);
if (popupWindow == null){
popupWindow = new PopupWindow(popupView, RelativeLayout.LayoutParams.MATCH_PARENT,
RelativeLayout.LayoutParams.WRAP_CONTENT, false);
}
//popupWindow的常规设置，设置点击外部事件，背景色
popupWindow.setTouchable(true);
popupWindow.setFocusable(true);
popupWindow.setOutsideTouchable(true);
popupWindow.setBackgroundDrawable(new ColorDrawable(0x00000000));
popupWindow.setTouchInterceptor(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_OUTSIDE)
popupWindow.dismiss();
return false;
}
});
// 设置弹出窗体需要软键盘，放在setSoftInputMode之前
popupWindow.setSoftInputMode(PopupWindow.INPUT_METHOD_NEEDED);
// 再设置模式，和Activity的一样，覆盖，调整大小。
popupWindow.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
//设置popupwindow的显示位置，这里应该是显示在底部，即Bottom
popupWindow.showAtLocation(popupView, Gravity.BOTTOM, 0, 0);
popupWindow.update();
//设置监听
popupWindow.setOnDismissListener(new PopupWindow.OnDismissListener() {
// 在dismiss中恢复透明度
@RequiresApi(api = Build.VERSION_CODES.CUPCAKE)
public void onDismiss() {
mInputManager.hideSoftInputFromWindow(inputComment.getWindowToken(), 0); //强制隐藏键盘
}
});
//外部点击事件
rl_input_container.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mInputManager.hideSoftInputFromWindow(inputComment.getWindowToken(), 0); //强制隐藏键盘
popupWindow.dismiss();
}
});
//评论框内的发送按钮设置点击事件
btn_submit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
nInputContentText = inputComment.getText().toString().trim();
if (nInputContentText == null || "".equals(nInputContentText)) {
showToastMsgShort("请输入评论内容");
return;
}
mInputManager.hideSoftInputFromWindow(inputComment.getWindowToken(),0);
popupWindow.dismiss();
}
});
}

popupWindow.setSoftInputMode(PopupWindow.INPUT_METHOD_NEEDED);
popupWindow.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);

<?xml version="1.0" encoding="utf-8"? 
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/rl_input_container"
android:layout_width="match_parent"
android:layout_height="match_parent" 
<LinearLayout
android:layout_width="match_parent"
android:layout_height="44dp"
android:background="@color/colorWhite"
android:layout_alignParentBottom="true"
android:orientation="horizontal" 
<EditText
android:id="@+id/et_discuss"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="38dp"
android:textColorHint="#a2a2a2"
android:textSize="13sp"
android:layout_marginRight="7dp"
android:layout_marginLeft="15dp"
android:layout_marginBottom="6dp"
android:layout_marginTop="6dp"
android:ellipsize="end"
android:background="@drawable/round_edittext_input"
android:layout_gravity="center_vertical"
android:paddingLeft="@dimen/ten_padding"
android:paddingRight="@dimen/ten_padding"
android:singleLine="true" / 
<Button
android:id="@+id/btn_confirm"
android:text="发送"
android:background="@drawable/btn_discuss_bg"
android:textSize="16sp"
android:layout_gravity="center_vertical"
android:textColorHint="#b7b7b7"
android:textColor="@color/colorWhite"
android:layout_marginRight="@dimen/ten_padding"
android:gravity="center"
android:layout_width="40dp"
android:layout_height="38dp"/ 
</LinearLayout 
</RelativeLayout