Android Studio里的各种弹窗

package com.ldc.abtest; import android.os.Bundle; import android.view.Gravity; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.widget.Button; import android.widget.ImageView; import android.widget.PopupMenu; import androidx.appcompat.app.ActionBar; import androidx.appcompat.app.AppCompatActivity; public class MainActivity extends AppCompatActivity { private View vi; private View view; private final ShowMsg msg = new ShowMsg(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); vi = new View(this); view = findViewById(android.R.id.content); setCustomActionBar(); myActionBar(); Button button = findViewById(R.id.button); button.setOnClickListener(this::popupMenu); } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.popup_menu, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { if (item.getItemId() == R.id.game) { popupMenu(vi); } else if (item.getItemId() == R.id.book) { popupMenu(view); } else if (item.getItemId() == R.id.music) { popupMenu(findViewById(R.id.music)); } return false; } private void popupMenu(View v) { PopupMenu popupMenu = new PopupMenu(this, v); popupMenu.getMenuInflater().inflate(R.menu.popup_menu, popupMenu.getMenu()); popupMenu.setOnMenuItemClickListener(item -> { // 处理菜单项点击事件 if (item.getItemId() == R.id.game) { msg.SM(view, "打游戏"); } else if (item.getItemId() == R.id.book) { msg.SM(view, "看书"); } else if (item.getItemId() == R.id.music) { msg.SM(view, "听音乐"); } return true; }); popupMenu.show(); // 显示弹出菜单 } private void setCustomActionBar() { ActionBar.LayoutParams lp = new ActionBar.LayoutParams(ActionBar.LayoutParams.MATCH_PARENT, ActionBar.LayoutParams.MATCH_PARENT, Gravity.CENTER); View mActionBarView = View.inflate(this, R.layout.actionbar_layout, null); ActionBar actionBar = getSupportActionBar(); assert actionBar != null; actionBar.setCustomView(mActionBarView, lp); actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM); actionBar.setDisplayShowCustomEnabled(true); actionBar.setDisplayShowHomeEnabled(false); actionBar.setDisplayShowTitleEnabled(false); } private void myActionBar() { //自定义ActionBar一定要写在onCreate()外面，点击才起作用。 Button bt_my = findViewById(R.id.bt_my); bt_my.setOnClickListener(v -> { popupMenu(v); System.out.println(v); }); ImageView iv_game = findViewById(R.id.iv_game); iv_game.setOnClickListener(v -> { popupMenu(v); System.out.println(v); }); } }