android PopupWindow

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:gravity="center_horizontal"    android:orientation="vertical"    android:paddingLeft="15dp"    android:paddingRight="15dp"    android:background="@color/grey" >    <View        android:layout_width="match_parent"        android:layout_height="1dp"        android:background="@android:drawable/divider_horizontal_bright" />    <TextView        android:id="@+id/tv_all_state"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:background="#ECF0F2"        android:gravity="center"        android:padding="10dp"        android:text="全部"        android:textColor="@color/black" />    <View        android:layout_width="match_parent"        android:layout_height="1dp"        android:background="@android:drawable/divider_horizontal_bright" />    <TextView        android:id="@+id/tv_done"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:background="#ECF0F2"        android:gravity="center"        android:padding="10dp"        android:text="已完成"        android:textColor="@color/black" />    <View        android:layout_width="match_parent"        android:layout_height="1dp"        android:background="@android:drawable/divider_horizontal_bright" />    <TextView        android:id="@+id/tv_undo"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:background="#ECF0F2"        android:gravity="center"        android:padding="10dp"        android:text="未完成"        android:textColor="@color/black" /></LinearLayout>

package com.example.demopopupwindow.activity; import com.example.demopopupwindow.R; import android.app.Activity; import android.graphics.drawable.BitmapDrawable;import android.os.Bundle; import android.view.View;import android.view.View.OnClickListener; import android.widget.PopupWindow;import android.widget.TextView;import android.widget.LinearLayout.LayoutParams;public class PopupWindowActivity extends Activity implements OnClickListener{ private TextView                   mTopChooseBar; private PopupWindow                mPopupWindow; private TextView                   mTvDone;  private TextView                   mTvUnDo;  private TextView                   mTvAllState;    @Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);    mTopChooseBar = (TextView) this.findViewById( R.id.tv_topbar);    mTopChooseBar.setOnClickListener(this);        setOnChooseListener();}     public void setOnChooseListener() {View view = View.inflate( this, R.layout.topbar, null );        mTvDone = ( TextView ) view.findViewById( R.id.tv_done );        mTvUnDo = ( TextView ) view.findViewById( R.id.tv_undo );        mTvAllState = ( TextView ) view.findViewById( R.id.tv_all_state );        mPopupWindow = new PopupWindow(view ,LayoutParams.MATCH_PARENT,                LayoutParams.WRAP_CONTENT, false );        mPopupWindow.setBackgroundDrawable( new BitmapDrawable() );        mPopupWindow.setOutsideTouchable( true );        mPopupWindow.setFocusable( true );        mTopChooseBar.setOnClickListener( this );        mTvDone.setOnClickListener( this );        mTvUnDo.setOnClickListener( this );        mTvAllState.setOnClickListener( this );    }@Overridepublic void onClick(View v) { switch (v.getId()) {case R.id.tv_topbar:if ( mPopupWindow.isShowing() ) {                mPopupWindow.dismiss();            }            else {                mPopupWindow.showAsDropDown( v );            }break;case R.id.tv_done:mTopChooseBar.setText( mTvDone.getText() );            mPopupWindow.dismiss();break;case R.id.tv_undo: mTopChooseBar.setText( mTvUnDo.getText() );             mPopupWindow.dismiss();break;case R.id.tv_all_state: mTopChooseBar.setText( mTvAllState.getText() );             mPopupWindow.dismiss();break;default:break;}} }

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