Android studio 弹出式菜单和上下文菜单

文件结构：

java代码：

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.PopupMenu;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {


    private static final int upload = 1;
    private static final int download = 2;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        TextView textView = findViewById(R.id.text_view);
        registerForContextMenu(textView);
        //弹出式菜单
        textView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                PopupMenu popupMenu = new PopupMenu(MainActivity.this,view);
                popupMenu.inflate(R.menu.main_menu);
                popupMenu.show();
                popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
                    @Override
                    public boolean onMenuItemClick(MenuItem item) {
                        switch (item.getItemId()){
                            case R.id.upload:
                                Toast.makeText(MainActivity.this,"你选择了" + getResources().getString(R.string.upload),Toast.LENGTH_SHORT).show();
                                break;
                            case R.id.download:
                                Toast.makeText(MainActivity.this,"你选择了" + getResources().getString(R.string.download),Toast.LENGTH_SHORT).show();
                                break;
                            case R.id.stop:
                                Toast.makeText(MainActivity.this,"你选择了" + getResources().getString(R.string.stop),Toast.LENGTH_SHORT).show();
                                break;
                            case R.id.quit:
                                Toast.makeText(MainActivity.this,"你选择了" + getResources().getString(R.string.quit),Toast.LENGTH_SHORT).show();
                                break;

                        }
                        return false;
                    }
                });
            }
        });
    }


    @Override
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
        menu.setHeaderIcon(R.mipmap.ic_launcher);
        menu.setHeaderTitle("我是上下文菜单");


        getMenuInflater().inflate(R.menu.main_menu,menu);
        super.onCreateContextMenu(menu, v, menuInfo);
    }


    @Override
    public boolean onContextItemSelected(MenuItem item) {

        switch (item.getItemId()){
            case R.id.upload:
                Toast.makeText(this,"你选择了" + getResources().getString(R.string.upload),Toast.LENGTH_SHORT).show();
                break;
            case R.id.download:
                Toast.makeText(this,"你选择了" + getResources().getString(R.string.download),Toast.LENGTH_SHORT).show();
                break;
            case R.id.stop:
                Toast.makeText(this,"你选择了" + getResources().getString(R.string.stop),Toast.LENGTH_SHORT).show();
                break;
            case R.id.quit:
                Toast.makeText(this,"你选择了" + getResources().getString(R.string.quit),Toast.LENGTH_SHORT).show();
                break;

        }
        return super.onContextItemSelected(item);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        //1.组id 、2.菜单id 、 3. 排序id 、 4.菜单显示内容
//        menu.add(0,upload,upload,"上传");
//        menu.add(0,download,download,"下载");
        getMenuInflater().inflate(R.menu.main_menu,menu);


        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        switch (item.getItemId()){
            case R.id.upload:
                Toast.makeText(this,"你选择了" + getResources().getString(R.string.upload),Toast.LENGTH_SHORT).show();
                break;
            case R.id.download:
                Toast.makeText(this,"你选择了" + getResources().getString(R.string.download),Toast.LENGTH_SHORT).show();
                break;
            case R.id.stop:
                Toast.makeText(this,"你选择了" + getResources().getString(R.string.stop),Toast.LENGTH_SHORT).show();
                break;
            case R.id.quit:
                Toast.makeText(this,"你选择了" + getResources().getString(R.string.quit),Toast.LENGTH_SHORT).show();
                break;

        }

        return super.onOptionsItemSelected(item);
    }
}

菜单layout：

xml：

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:android="http://schemas.android.com/apk/res/android">

    <item
        android:id="@+id/upload"
        android:icon="@mipmap/ic_launcher_round"
        android:title="@string/upload" />
    <item
        android:id="@+id/download"
        android:title="@string/download" />
    <item
        android:id="@+id/stop"
        android:title="@string/stop" />
    <menu >
        <item android:title="Item" />
    </menu>
    <item
        android:id="@+id/quit"
        android:title="@string/quit" />
</menu>