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>