基于Android实现点击某个按钮让菜单选项从按钮周围指定位置弹出

package zhangphil.materialdesign;  
import android.app.Activity; 
import android.os.Bundle; 
import android.support.v.widget.PopupMenu; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.Button; 
import android.widget.Toast;  
public class MainActivity extends Activity {  
@Override 
  protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main);  
    final Button button = (Button) findViewById(R.id.button); 
    button.setOnClickListener(new View.OnClickListener() {  
     @Override 
      public void onClick(View v) { 
        showPopupMenu(button); 
      } 
    }); 
  }  
  private void showPopupMenu(View view) { 
    // View当前PopupMenu显示的相对View的位置 
    PopupMenu popupMenu = new PopupMenu(this, view);  
    // menu布局 
    popupMenu.getMenuInflater().inflate(R.menu.main, popupMenu.getMenu());  
    // menu的item点击事件 
    popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() { 
      @Override 
      public boolean onMenuItemClick(MenuItem item) { 
        Toast.makeText(getApplicationContext(), item.getTitle(), Toast.LENGTH_SHORT).show(); 
        return false; 
      } 
    });  
     // PopupMenu关闭事件 
    popupMenu.setOnDismissListener(new PopupMenu.OnDismissListener() { 
       @Override 
       public void onDismiss(PopupMenu menu) { 
         Toast.makeText(getApplicationContext(), "关闭PopupMenu", Toast.LENGTH_SHORT).show(); 
      } 
     }); 
  
     popupMenu.show(); 
   } 
} 
 package zhangphil.materialdesign;
import android.app.Activity;
import android.os.Bundle;
import android.support.v7.widget.PopupMenu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends Activity {
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 final Button button = (Button) findViewById(R.id.button);
 button.setOnClickListener(new View.OnClickListener() {
  @Override
  public void onClick(View v) {
  showPopupMenu(button);
  }
 });
 }
 private void showPopupMenu(View view) {
 // View当前PopupMenu显示的相对View的位置
 PopupMenu popupMenu = new PopupMenu(this, view);
 // menu布局
 popupMenu.getMenuInflater().inflate(R.menu.main, popupMenu.getMenu());
 // menu的item点击事件
 popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
  @Override
  public boolean onMenuItemClick(MenuItem item) {
  Toast.makeText(getApplicationContext(), item.getTitle(), Toast.LENGTH_SHORT).show();
  return false;
  }
 });
 // PopupMenu关闭事件
 popupMenu.setOnDismissListener(new PopupMenu.OnDismissListener() {
  @Override
  public void onDismiss(PopupMenu menu) {
  Toast.makeText(getApplicationContext(), "关闭PopupMenu", Toast.LENGTH_SHORT).show();
  }
 });
 popupMenu.show();
 }
}

<menu xmlns:android="http://schemas.android.com/apk/res/android" 
   xmlns:app="http://schemas.android.com/apk/res-auto" 
   xmlns:tools="http://schemas.android.com/tools" > 
   <item 
     android:id="@+id/action_open" 
     android:orderInCategory=" 
     android:title="打开" 
     app:showAsAction="never"/> 
  <item 
    android:id="@+id/action_new" 
    android:orderInCategory=" 
    android:title="新建" 
    app:showAsAction="never"/> 
  <item 
    android:id="@+id/action_del" 
    android:orderInCategory=" 
    android:title="删除" 
     app:showAsAction="never"/> 
 </menu>