您好我在xml中有一个按钮，我在我的活动中使用OnTouchListener来button按下并释放。但问题是，当我按下按钮时，背景颜色不会改变。我延伸的时间与OnClickListener的活动有关，背景正在发生变化。任何人都可以告诉我的代码有什么问题。
public class pushbuttonActivity extends Activity implements OnTouchListener {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.push_button_layout);
GPIO_0_B = (Button) findViewById(R.id.GPIO_0);
GPIO_0_B.setOnTouchListener((OnTouchListener) this);
}
public boolean onTouch(View v,MotionEvent event) {
switch(v.getId()) {
case R.id.GPIO_0 : GPIOPORT=0;
break;
default : break;
}
if(event.getAction() == MotionEvent.ACTION_DOWN) {
//Do something on touch
} else if (event.getAction() == MotionEvent.ACTION_UP) {
//Do something in release
}
return true;
}
push_button_layout.xml
<RelativeLayout .........
.................
<Button
android:id="@+id/GPIO_0"
android:layout_width="80dp"
android:layout_height="80dp"
android:background="@drawable/round_button"
android:textStyle="bold"
android:textSize="14sp"
android:text="GPIO 0"
android:layout_marginTop="15dp"
android:layout_marginBottom="10dp"
android:layout_marginLeft="50dp"
/>
round_button.xml
<?xml version="1.0" encoding="utf-8" ?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<!-- Non focused states
-->
<item android:state_focused="false" android:state_selected="false" android:state_pressed="false" android:drawable="@drawable/round_button_unfocused" />
<item android:state_focused="false" android:state_selected="true" android:state_pressed="false" android:drawable="@drawable/round_button_unfocused" />
<!-- Focused states
-->
<item android:state_focused="true" android:state_selected="false" android:state_pressed="false" android:drawable="@drawable/round_button_focus" />
<item android:state_focused="true" android:state_selected="true" android:state_pressed="false" android:drawable="@drawable/round_button_focus" />
<!-- Pressed
-->
<item android:state_pressed="true" android:drawable="@drawable/round_button_press" />
</selector>
round_button_focus.xml
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<stroke
android:width="1dp"
android:color="#FF404040" />
<corners
android:radius="6dp" />
<size android:height="40dp"
android:width="40dp"/>
<gradient
android:startColor="#FF6800"
android:centerColor="#FF8000"
android:endColor="#FF9700"
android:angle="90" />
</shape>
round_button_press.xml
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<stroke
android:width="2dp"
android:color="#FF606060" />
<corners
android:radius="40dp" />
<gradient
android:startColor="#FF0000"
android:centerColor="#FF0000"
android:endColor="#FF0000"
android:angle="90" />
</shape>
round_button_unfocus.xml
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<stroke
android:width="2dp"
android:color="#FF606060" />
<corners
android:radius="40dp" />
<gradient
android:startColor="#550000"
android:centerColor="#550000"
android:endColor="#550000"
android:angle="90" />
</shape>
抱歉这篇冗长的帖子......
答案 0 :(得分：2)
使用Ontouch，您将无法获得按钮的Clicked状态
使用Onclick Coz，在onclick方法按下按钮状态为真
Actually I need to get button click and release
使用它来获取点击和释放
GPIO_0_B.setOnClickListener(new OnClickListener() {
@Override
public boolean onTouch(View v, MotionEvent event)
{
if(event.getAction() == MotionEvent.ACTION_DOWN) {
GPIO_0_B.setBackground(R.drawable.round_button_focus);
} else if (event.getAction() == MotionEvent.ACTION_UP) {
GPIO_0_B.setBackground(R.drawable.round_button_unfocused);
}
}
};
对于触摸列表器，请更改此行GPIO_0_B.setOnClickListener(new OnClickListener() {
要
GPIO_0_B.setOnTouchListener(new OnTouchListener() {
` how can I do with its id, Actually I have more than one button`
在oncreate（）
中执行此操作 {
Button GPIO_0_B1 =(Button) findViewById(R.id.youridfromxml);
Button GPIO_0_B1 =(Button) findViewById(R.id.youridfromxml);
GPIO_0_B1.setOnClickListener(getOnClickDoSomething(GPIO_0_B1);
GPIO_0_B2.setOnClickListener(getOnClickDoSomething(GPIO_0_B2);
}
现在
创建新方法（在oncreate（）方法之外： - noobs信息）
View.OnClickListener getOnClickDoSomething(final Button Gpbot)
{
return new View.OnClickListener()
{
@Override
public void onClick(View v)
{
if(event.getAction() == MotionEvent.ACTION_DOWN) {
Gpbot.setBackground(R.drawable.round_button_focus);
} else if (event.getAction() == MotionEvent.ACTION_UP) {
Gpbot.setBackground(R.drawable.round_button_unfocused);
}
}
}
}
答案 1 :(得分：2)
只需将布局设置为xml中按钮的背景即可。在你的drawable文件夹中有一个xml，例如：clickedstate.xml就像这样
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_enabled="false"
android:drawable="@drawable/default_bgnd" />
<item android:state_focused="true"
android:drawable="@drawable/new_green" />
<item android:state_pressed="true"
android:drawable="@drawable/new_green" />
<item android:state_checked="true"
android:drawable="@drawable/new_green"/>
<item android:state_selected="true"
android:drawable="@drawable/new_green" />
</selector>
在您的xml中，只需为按钮执行此操作
android:background="@drawable/clickedstate"
答案 2 :(得分：2)
@Override
public boolean onTouch(View v, MotionEvent event) {
switch(event.getAction()) {
case MotionEvent.ACTION_DOWN:
v.setPressed(true);
//doYourWorkHere();
break;
case MotionEvent.ACTION_UP:
v.setPressed(false);
//doYourWorkHere();
break;
}
return true;/* true to deactivate other listeners at the same time; false otherwise */
}
答案 3 :(得分：1)
您可以通过onclick事件监听器使用以下代码来实现此目的：
StateListDrawable states = new StateListDrawable();
Drawable image_normal = //drawable of the image
Drawable image_focused = //drawable of the image
Drawable image_pressed = //drawable of the image
states.addState(new int[] {android.R.attr.state_pressed},image_focused);
states.addState(new int[] {android.R.attr.state_focused},image_pressed);
states.addState(new int[] { },image_normal);
buttonObj.setBackgroundDrawable(states);
答案 4 :(得分：0)
尝试使用此代码。
@Override
public boolean onTouch(View view, MotionEvent event) {
view.setSelected(true);
...
return true;
}