day02menu和PopupWindow

最新推荐文章于 2020-12-08 13:15:08 发布

原创最新推荐文章于 2020-12-08 13:15:08 发布 · 153 阅读

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CC 4.0 BY-SA版权

本文详细介绍了Android中三种菜单的实现方式：系统菜单、上下文菜单和弹出菜单，并展示了如何使用PopupWindow创建自定义的弹出窗口，包括沿手机边缘弹出的窗口和在指定控件下方弹出的窗口。

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menu菜单

布局

res —>menu文件夹—>xml（Menu resource file）

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@+id/blue" android:title="蓝色"></item>
    <item android:id="@+id/red" android:title="红色"></item>
    <item android:id="@+id/green" android:title="绿色"></item>
</menu>

1.系统菜单 OptionsMenu

public class MainActivity extends AppCompatActivity {

    TextView textView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        textView = findViewById(R.id.txt);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.my_menu,menu);
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()){
            case R.id.blue:
                textView.setTextColor(Color.parseColor("#0000ff"));
                break;
            case R.id.red:
                textView.setTextColor(Color.parseColor("#ff0000"));
                break;
            case R.id.green:
                textView.setTextColor(Color.parseColor("#00ff00"));
                break;
        }

        return super.onOptionsItemSelected(item);
    }
}

2.上下文菜单 ContextMenu

public class MainActivity extends AppCompatActivity {

    TextView textView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        textView = findViewById(R.id.txt);
        //为控件设置长按属性并将菜单添加到控件上
        registerForContextMenu(textView);
    }

    @Override
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
        getMenuInflater().inflate(R.menu.my_menu,menu);
        super.onCreateContextMenu(menu, v, menuInfo);
    }

    @Override
    public boolean onContextItemSelected(MenuItem item) {
        switch (item.getItemId()){
            case R.id.blue:
                textView.setTextColor(Color.parseColor("#0000ff"));
                break;
            case R.id.red:
                textView.setTextColor(Color.parseColor("#ff0000"));
                break;
            case R.id.green:
                textView.setTextColor(Color.parseColor("#00ff00"));
                break;
        }
        return super.onContextItemSelected(item);
    }
}

3.弹出菜单

public class MainActivity extends AppCompatActivity {

    TextView textView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        textView = findViewById(R.id.txt);
        textView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                showPopupMenu();
            }
        });
    }
    public void showPopupMenu(){
    	//第一个参数：上下文，第二个参数：控件（该控件下面谈出）
        PopupMenu popupMenu = new PopupMenu(this,textView);
        popupMenu.inflate(R.menu.my_menu);
        popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem item) {
                switch (item.getItemId()){
                    case R.id.blue:
                        textView.setTextColor(Color.parseColor("#0000ff"));
                        break;
                    case R.id.red:
                        textView.setTextColor(Color.parseColor("#ff0000"));
                        break;
                    case R.id.green:
                        textView.setTextColor(Color.parseColor("#00ff00"));
                        break;
                }
                return true;
            }
        });
        popupMenu.show();
    }
}

PopupWindow

1.在指定控件下

public void showPopupWindow(){
    PopupWindow popupWindow = new PopupWindow(this);
    popupWindow.setWidth(200);//设置宽
    popupWindow.setHeight(300);//设置高
    View view = View.inflate(this,R.layout.layout,null);
    textView1 = view.findViewById(R.id.search);
    textView2 = view.findViewById(R.id.lock);
    textView3 = view.findViewById(R.id.photo);
    popupWindow.setContentView(view);//设置布局
    popupWindow.setOutsideTouchable(true);
    WindowManager.LayoutParams attributes = getWindow().getAttributes();
    attributes.alpha=0.5f;//透明度
    getWindow().setAttributes(attributes);
    popupWindow.setOnDismissListener(new PopupWindow.OnDismissListener() {
        @Override
        public void onDismiss() {
            WindowManager.LayoutParams attributes1 = getWindow().getAttributes();
            attributes1.alpha=1f;//消失是取消透明
            getWindow().setAttributes(attributes1);
        }
    });
    //点击事件
    textView1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(MainActivity.this, textView1.getText().toString(), Toast.LENGTH_SHORT).show();
        }
    });
    textView2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(MainActivity.this, textView2.getText().toString(), Toast.LENGTH_SHORT).show();
        }
    });
    textView3.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(MainActivity.this, textView3.getText().toString(), Toast.LENGTH_SHORT).show();
        }
    });
    //设置动画
    popupWindow.setAnimationStyle(R.style.my_anim1);
    //显示且绑定控件
    popupWindow.showAsDropDown(imageView);
}

2.沿手机边缘弹出

public void showBottomPopupWindow(){
    PopupWindow popupWindow = new PopupWindow(this);
   popupWindow.setWidth(WindowManager.LayoutParams.MATCH_PARENT);
    popupWindow.setHeight(350);
    View view = View.inflate(this,R.layout.layout,null);
    textView1 = view.findViewById(R.id.search);
    textView2 = view.findViewById(R.id.lock);
    textView3 = view.findViewById(R.id.photo);
    final View view1 = View.inflate(this,R.layout.activity_main,null);
    textView1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            textView.setBackgroundColor(Color.parseColor("#ff0000"));
        }
    });
    textView2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            textView.setBackgroundColor(Color.parseColor("#00ff00"));
        }
    });
    textView3.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            textView.setBackgroundColor(Color.parseColor("#0000ff"));
        }
    });
    popupWindow.setContentView(view);
    popupWindow.setOutsideTouchable(true);
    popupWindow.setFocusable(true);
    popupWindow.setBackgroundDrawable(new ColorDrawable(0x00000000));
    popupWindow.setAnimationStyle(R.style.my_anim2);
    //底部弹出
    popupWindow.showAtLocation(view1,Gravity.BOTTOM,0,0);
}

简易动画

res—>anim 文件夹—>xml

<set xmlns:android="http://schemas.android.com/apk/res/android" android:duration="1000">
    <translate
        android:fromYDelta="100%"
        android:toYDelta="0%">
    </translate>
</set>

values中style.xml

<style name="my_anim1">
    <item name="android:windowEnterAnimation">@anim/anim_in</item>
    <item name="android:windowExitAnimation">@anim/anim_out</item>
</style>