android-button

Why declare buttons in onCreate() in MainActivity.java?

由 妖精的绣舞 提交于 2019-12-08 09:06:57
问题 I'm a noob in writing Android app. The below 2 examples about declaring buttons are all from the Android developer site. (So both of them should be correct and working.) Example 1: from http://developer.android.com/training/basics/firstapp/building-ui.html <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/button_send" android:onClick="sendMessage" /> Example 2: from http://developer.android.com/guide/topics/ui/declaring-layout.html

Custom Button Animation in Android

由 喜欢而已 提交于 2019-12-08 07:37:43
问题 In my application, when a user presses a button in the menu, I would like the button to scale to a larger size, and then when the button is released, it needs to scale back to its original size. In xml, I have created the following animator: <?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android" android:ordering="together"> <objectAnimator android:propertyName="scaleX" android:duration="100" android:valueFrom="1.0" android:valueTo="1.3" android

How to get onClickListener for Android array of buttons to work

由 十年热恋 提交于 2019-12-08 05:42:27
问题 I have created a dynamic array of buttons that come from sqllite database. For the life of me I cannot get a click listener set up to address each button individually. I have been searching for 3 hours with no success at all. Any help would be appreciated. Don't worry about the database crap, it's just the listener. imports... public class CreatePlayList extends Activity { ScrollView scrollleft, scrollright; LinearLayout songsright, songsleft; TextView testtext; String[][] allsongs; int

Custom Button Animation in Android

由 拈花ヽ惹草 提交于 2019-12-08 03:04:27
In my application, when a user presses a button in the menu, I would like the button to scale to a larger size, and then when the button is released, it needs to scale back to its original size. In xml, I have created the following animator: <?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android" android:ordering="together"> <objectAnimator android:propertyName="scaleX" android:duration="100" android:valueFrom="1.0" android:valueTo="1.3" android:valueType="floatType"/> <objectAnimator android:propertyName="scaleY" android:duration="100" android

Change textView while moving finger across buttons

由 丶灬走出姿态 提交于 2019-12-08 02:53:52
问题 In my app, I have an activity in which there are 9 buttons and 1 textView . I am making use of OnTouchListener to change the text in the textView as I move my finger accross the buttons. This is what my activity looks like: Here is my java code: button1.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { textView.setText("Button 1"); return false; } }); button2.setOnTouchListener(new View.OnTouchListener() { @Override public boolean

Is there a way to create a triangular button on Android?

由 点点圈 提交于 2019-12-08 01:54:22
问题 Is there a way I can create a button which is shaped as a triangle? I know I can put a triangle image as background, but this will make the area outside the triangle clickable. Is there a way to sey the button corners X and Y so I could make it triangular? 回答1: You can override the OnTouch Event method in a CustomView / CustomButton Inside you have the MotionEvent were you can check if the Touch was inside your Triangle (with the help of some mathematics :P) 回答2: If you want to get exotic

How to set the state_pressed of a button

由 自闭症网瘾萝莉.ら 提交于 2019-12-07 19:27:25
I use a xml file to color my button. In the xml a have this code to define the color of my button when it's clicked. <?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_pressed="true" > <shape> <gradient android:startColor="@color/mainRaddoppiaButtonBackgroundEnd" android:endColor="@color/mainRaddoppiaButtonBackgroundStart" android:angle="270" /> <stroke android:width="0dp" android:color="@color/mainRaddoppiaButtonBackgroundStart" /> <corners android:radius="3dp" /> <padding android:left="10dp" android:top="10dp"

Android Service (“startService & stopService”) and Play/Stop Button in One

由 守給你的承諾、 提交于 2019-12-07 15:27:12
问题 I am developing an Android app and I need to make one button which will be a Play/Stop button for Android Service playing and stopping. Play button is for startActivity(); Stop button is for stopActivity(); How do I make this? 回答1: You just need to declare a flag variable and declare body of onclick() based on flag value like this. public class ServiceActivity extends Activity { Button play; int button_status=1; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate

Prevent ProgressDialog from getting dismissed by onClick

由 主宰稳场 提交于 2019-12-07 04:03:57
问题 I' using ProgressDialog to show the user that he has to wait and to make the surface of my app "untouchable" while the user has to wait. I added a Button to the progressDialog which should start some actions if certain conditions are true. The problem is that everytime the user press the button the progressDialog gets automatically dismissed. Even if no action is triggered. How can I prevent the progressDialog from getting dismissed when onClick is called? thx & regards EDIT: connectingDialog

rotate dial in limited degrees

由 六眼飞鱼酱① 提交于 2019-12-06 23:56:10
问题 All I want rotate image in particular angle as like below image. I have code for rotation but it rotate 360 degree but I want it only for particular degrees and get the selected number which is upper side of dial. below is my code. My custom View this work fine but lake of perfomance. import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.PointF; import
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