【AndroidStudio】安卓虚拟摇杆组件demo

# Android Joystick Demo _This is just a very simple demo which implement this [virtual joystick android Library](https://github.com/controlwear/virtual-joystick-android)._  ## Code For those who don't want to browse the project or files, here it is... #### Gradle file Add library to dependencies. ``` dependencies { ... compile 'io.github.controlwear:virtualjoystick:1.9.2' } ``` #### Manifest Force activity to landscape. ```xml <activity android:name=".MainActivity" android:screenOrientation="landscape"> ... ``` #### Layout Just a couple of TextView and JoystickView to activity_main.xml ```xml <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="io.github.controlwear.joystickdemo.MainActivity" android:padding="16dp"> <TextView android:id="@+id/textView_angle_left" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="0°"/> <TextView android:id="@+id/textView_strength_left" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/textView_angle_left" android:text="0%"/> <io.github.controlwear.virtual.joystick.android.JoystickView xmlns:custom="http://schemas.android.com/apk/res-auto" android:id="@+id/joystickView_left" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_margin="32dp" android:background="@drawable/joystick_background" custom:JV_buttonImage="@drawable/pink_ball" custom:JV_fixedCenter="false"/> <TextView android:id="@+id/textView_angle_right" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:text="0°"/> <TextView android:id="@+id/textView_strength_right" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_below="@+id/textView_angle_right" android:text="0%"/> <TextView android:id="@+id/textView_coordinate_right" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_below="@+id/textView_strength_right" android:text="x050:x050"/> <io.github.controlwear.virtual.joystick.android.JoystickView xmlns:custom="http://schemas.android.com/apk/res-auto" android:id="@+id/joystickView_right" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_alignParentRight="true" android:layout_marginTop="64dp" custom:JV_borderWidth="8dp" custom:JV_backgroundColor="#009688" custom:JV_borderColor="#00796B" custom:JV_buttonColor="#FF6E40"/> </RelativeLayout> ``` #### Java MainActivity.java ```java public class MainActivity extends AppCompatActivity { private TextView mTextViewAngleLeft; private TextView mTextViewStrengthLeft; private TextView mTextViewAngleRight; private TextView mTextViewStrengthRight; private TextView mTextViewCoordinateRight; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mTextViewAngleLeft = (TextView) findViewById(R.id.textView_angle_left); mTextViewStrengthLeft = (TextView) findViewById(R.id.textView_strength_left); JoystickView joystickLeft = (JoystickView) findViewById(R.id.joystickView_left); joystickLeft.setOnMoveListener(new JoystickView.OnMoveListener() { @Override public void onMove(int angle, int strength) { mTextViewAngleLeft.setText(angle + "°"); mTextViewStrengthLeft.setText(strength + "%"); } }); mTextViewAngleRight = (TextView) findViewById(R.id.textView_angle_right); mTextViewStrengthRight = (TextView) findViewById(R.id.textView_strength_right); mTextViewCoordinateRight = findViewById(R.id.textView_coordinate_right); final JoystickView joystickRight = (JoystickView) findViewById(R.id.joystickView_right); joystickRight.setOnMoveListener(new JoystickView.OnMoveListener() { @SuppressLint("DefaultLocale") @Override public void onMove(int angle, int strength) { mTextViewAngleRight.setText(angle + "°"); mTextViewStrengthRight.setText(strength + "%"); mTextViewCoordinateRight.setText( String.format("x%03d:y%03d", joystickRight.getNormalizedX(), joystickRight.getNormalizedY()) ); } }); } } ``` #### Images Here are the two images to put in drawable.   ### And that's it. The (quick) documentation of the library is [here](https://github.com/controlwear/virtual-joystick-android).