android app普遍常用的弹出上下文菜单是列表式的。QQ列表,在上方弹出冒泡效果菜单,如图
这里讲解一下如何写出这个效果:
图片资源:两张图片,可以拼接成如上效果。
首先,我们需要写布局文件:
layout_pop.xml (mipmap是android studio 的引用图片的写法,以前常用@drawable/xxx)
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dp">
<Button
android:id="@+id/bt_l"
style="@style/PopBtuton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/bg_pop_l_t"
android:text="复制" />
<Button
android:id="@+id/bt_r"
style="@style/PopBtuton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@+id/bt_l"
android:background="@mipmap/bg_pop_r_t"
android:text="回复" />
</RelativeLayout>
布局效果
接下来是重点:
先贴代码
PopOptionUtil.java
package com.mjc.popdemo;
import android.content.Context;
import android.graphics.drawable.BitmapDrawable;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.PopupWindow;
/**
* Created by imac on 15/7/8.
*/
public class PopOptionUtil {
private Context mContext;
private int popupWidth;
private int popupHeight;
private PopupWindow popupWindow;
private PopClickEvent mEvent;
private Button preBt;
private Button nextBt;
public PopOptionUtil(Context context) {
mContext = context;
View popupView = LayoutInflater.from(mContext).inflate(R.layout.layout_pop, null);
preBt = (Button) popupView.findViewById(R.id.bt_l);
nextBt = (Button) popupView.findViewById(R.id.bt_r);
popupWindow = new PopupWindow(popupView, ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.WRAP_CONTENT, true);
popupWindow.setBackgroundDrawable(new BitmapDrawable());
popupView.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);
popupWidth = popupView.getMeasuredWidth();
popupHeight = popupView.getMeasuredHeight();
}
public void show(View view) {
initEvent();
int[] location = new int[2];
view.getLocationOnScreen(location);
popupWindow.showAtLocation(view, Gravity.NO_GRAVITY, (location[0] + view.getWidth() / 2) - popupWidth / 2,
location[1] - popupHeight);
}
public void setOnPopClickEvent(PopClickEvent mEvent) {
this.mEvent = mEvent;
}
private void initEvent() {
if (mEvent != null) {
preBt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mEvent.onPreClick();
}
});
nextBt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mEvent.onNextClick();
}
});
}
}
}
其中Event是自定义的接口,用来监听两个Button的事件的
下面就是
PopClickEvent.java
public interface PopClickEvent {
public void onPreClick();
public void onNextClick();
}
使用方法:
package com.mjc.popdemo;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
View bt;
PopOptionUtil mPop;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bt = findViewById(R.id.test);
mPop = new PopOptionUtil(this);
mPop.setOnPopClickEvent(new PopClickEvent() {
@Override
public void onPreClick() {
Toast.makeText(MainActivity.this,"置顶",Toast.LENGTH_SHORT).show();
}
@Override
public void onNextClick() {
Toast.makeText(MainActivity.this,"删除",Toast.LENGTH_SHORT).show();
}
});
bt.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View view) {
mPop.show(view);
bt.setSelected(true);
return true;
}
});
}
}
最终效果:
是不是很简单的呢?快动手试试吧
参考:http://blog.csdn.net/u011494050/article/details/38691475
http://blog.csdn.net/meijian531161724/article/details/46804281
时间: 2024-10-16 06:17:41