Android 如何在单击时对 textview 产生闪烁效果？

How to make blink effect on textview on click?

提问by Maxwell

Hi I am new to android development. I want to create onclick effects to textview. When I click on the textview it will blink or something effects make. I tried it with change color, but it's not working. How can I make blink effect on textview onclick ?? please help me with example code. thanks in advance :)

嗨，我是 android 开发的新手。我想为 textview 创建 onclick 效果。当我点击 textview 时，它会闪烁或产生一些效果。我试过改变颜色，但它不起作用。如何在 textview onclick 上制作闪烁效果？请帮助我提供示例代码。提前致谢 ：）

回答by kikettas

The easiest way is to set this background in the TextView:

最简单的方法是在TextView 中设置此背景：

 android:background="?attr/selectableItemBackground"

And if you want to set a different color for the background, set that attras foregroundinstead of background.

如果您想为背景设置不同的颜色，请将该attr设置为foreground而不是background.

回答by Shivansh

create a xml with name something like txt_bg.xml

创建一个名称类似于 txt_bg.xml 的 xml

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

    <item android:drawable="@drawable/numpad_button_bg_selected" android:state_selected="true"></item>
    <item android:drawable="@drawable/numpad_button_bg_pressed" android:state_pressed="true"></item>
    <item android:drawable="@drawable/numpad_button_bg_normal"></item>

</selector>

then add in texview xml

然后添加texview xml

android:background="@drawable/txt_bg"
android:clickable="true"

hope it will help.

希望它会有所帮助。

回答by Juboraj Sarker

try this. it worked for me.

尝试这个。它对我有用。

        android:clickable="true"
        android:focusable="true"
        android:background="?android:attr/selectableItemBackground"

回答by duggu

try below code:-

试试下面的代码：-

        <Button
            android:id="@+id/action"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="3"
            android:layout_margin="5dp"
            android:background="@drawable/btn_click"
            android:gravity="center"
            android:textColor="@color/white"
            android:textSize="12sp" />

btn_click.xml

btn_click.xml

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

    <item android:drawable="@drawable/button_hover" android:state_pressed="true"/>
    <item android:drawable="@drawable/button"/> 

</selector>

or below also

或以下

btn_hover.xml

btn_hover.xml

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

    <stroke
        android:width="1dp"
        android:color="#000000" />

    <gradient
        android:angle="270"
        android:centerColor="#1a000000"
        android:endColor="#33000000"
        android:startColor="@android:color/transparent" >
    </gradient>

    <corners android:radius="5dp" />

</shape>

btn.xml

文件

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
    <stroke 
        android:color="#000000"
        android:width="1dp"
        />
    <gradient
        android:angle="270"
        android:centerColor="@android:color/transparent"
        android:endColor="@android:color/transparent"
        android:startColor="@android:color/transparent" >
    </gradient>
    <corners android:radius="5dp" />
</shape>

btn_click.xml

btn_click.xml

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

    <item android:drawable="@drawable/btn_hover" android:state_pressed="true"/>
    <item android:drawable="@drawable/btn"/>

</selector>

回答by Digvesh Patel

public class TesteBlinkActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        blink();
}

private void blink(){
    final Handler handler = new Handler();
    new Thread(new Runnable() {
        @Override
        public void run() {
        int timeToBlink = 1000;    //in milissegunds
        try{Thread.sleep(timeToBlink);}catch (Exception e) {}
            handler.post(new Runnable() {
                @Override
                    public void run() {
                    TextView txt = (TextView) findViewById(R.id.usage);
                    if(txt.getVisibility() == View.VISIBLE){
                        txt.setVisibility(View.INVISIBLE);
                    }else{
                        txt.setVisibility(View.VISIBLE);
                    }
                    blink();
                }
                });
            }
        }).start();
    }