I'm new and beginner actually to Android thing, and I followed this tutorial This Roulette I followed it and done everything exact same as the tutorial... But that tutorial is one year old.. Right now am using Android Studio latest version based on JDK Java 8..
This is my gradle build
apply plugin: 'com.android.application'
android {
compileSdkVersion 28
defaultConfig {
applicationId "com.example.sixgroup"
minSdkVersion 26
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test.ext:junit:1.1.1'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
implementation 'com.jakewharton:butterknife:10.2.1'
annotationProcessor 'com.jakewharton:butterknife-compiler:10.2.1'
}
My Code:
*************
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.DecelerateInterpolator;
import android.view.animation.RotateAnimation;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.Random;
import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;
public class MainActivity extends AppCompatActivity {
// sectors of our wheel (look at the image to see the sectors)
private static final String[] sectors = { "32 red", "15 black",
"19 red", "4 black", "21 red", "2 black", "25 red", "17 black", "34 red",
"6 black", "27 red","13 black", "36 red", "11 black", "30 red", "8 black",
"23 red", "10 black", "5 red", "24 black", "16 red", "33 black",
"1 red", "20 black", "14 red", "31 black", "9 red", "22 black",
"18 red", "29 black", "7 red", "28 black", "12 red", "35 black",
"3 red", "26 black", "zero"
};
@BindView(R.id.spinBtn)
Button spinBtn;
@BindView(R.id.resultTv)
TextView resultTv;
@BindView(R.id.wheel)
ImageView wheel;
// We create a Random instance to make our wheel spin randomly
private static final Random RANDOM = new Random();
private int degree = 0;
// We have 37 sectors on the wheel, we divide 360 by this value to have angle for each sector
// we divide by 2 to have a half sector
private static final float HALF_SECTOR = 360f / 37f / 2f;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
}
@OnClick(R.id.spinBtn)
public void spin(View v) {
// we calculate random angle for rotation of our wheel
degree = RANDOM.nextInt(360) + 720;
int degreeOld = degree % 360;
// rotation effect on the center of the wheel
RotateAnimation rotateAnim = new RotateAnimation(degreeOld, degree,
RotateAnimation.RELATIVE_TO_SELF, 0.5f, RotateAnimation.RELATIVE_TO_SELF, 0.5f);
rotateAnim.setDuration(3600);
rotateAnim.setFillAfter(true);
rotateAnim.setInterpolator(new DecelerateInterpolator());
rotateAnim.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
// we empty the result text view when the animation start
resultTv.setText("");
}
@Override
public void onAnimationEnd(Animation animation) {
// we display the correct sector pointed by the triangle at the end of the rotate animation
resultTv.setText(getSector(360 - (degree % 360)));
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
// we start the animation
wheel.startAnimation(rotateAnim);
}
private String getSector(int degrees) {
int i = 0;
String text = null;
do {
// start and end of each sector on the wheel
float start = HALF_SECTOR * ((i * 2) + 1);
float end = HALF_SECTOR * ((i * 2) + 3);
if (degrees >= start && degrees < end) {
// degrees is in [start;end[
// so text is equals to sectors[i];
text = sectors[i];
}
i++;
// now we can test our Android Roulette Game :)
// That's all !
// In the second part, you will learn how to add some bets on the table to play to the Roulette Game :)
// Subscribe and stay tuned !
} while (text == null && i < sectors.length);
return text;
}
}
**************
Everything update.. So am not sure why am getting
A/libc: Fatal signal 11 (SIGSEGV), code 1, fault addr 0x68 in tid 12075 (xample.sixgroup)
The log:
2020-05-30 18:02:43.851 25578-25578/com.example.sixgroup I/zygote64: at void com.example.sixgroup.MainActivity.onCreate(android.os.Bundle) (MainActivity.java:46)
2020-05-30 18:02:43.851 25578-25578/com.example.sixgroup I/zygote64: at void android.app.Activity.performCreate(android.os.Bundle) (Activity.java:7183)
2020-05-30 18:02:43.851 25578-25578/com.example.sixgroup I/zygote64: at void android.app.Instrumentation.callActivityOnCreate(android.app.Activity, android.os.Bundle) (Instrumentation.java:1220)
2020-05-30 18:02:43.851 25578-25578/com.example.sixgroup I/zygote64: at android.app.Activity android.app.ActivityThread.performLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent) (ActivityThread.java:2910)
2020-05-30 18:02:43.851 25578-25578/com.example.sixgroup I/zygote64: at void android.app.ActivityThread.handleLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:3032)
2020-05-30 18:02:43.851 25578-25578/com.example.sixgroup I/zygote64: at void android.app.ActivityThread.-wrap11(android.app.ActivityThread, android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:-1)
2020-05-30 18:02:43.851 25578-25578/com.example.sixgroup I/zygote64: at void android.app.ActivityThread$H.handleMessage(android.os.Message) (ActivityThread.java:1696)
2020-05-30 18:02:43.851 25578-25578/com.example.sixgroup I/zygote64: at void android.os.Handler.dispatchMessage(android.os.Message) (Handler.java:105)
2020-05-30 18:02:43.851 25578-25578/com.example.sixgroup I/zygote64: at void android.os.Looper.loop() (Looper.java:164)
2020-05-30 18:02:43.851 25578-25578/com.example.sixgroup I/zygote64: at void android.app.ActivityThread.main(java.lang.String[]) (ActivityThread.java:6944)
2020-05-30 18:02:43.851 25578-25578/com.example.sixgroup I/zygote64: at java.lang.Object java.lang.reflect.Method.invoke(java.lang.Object, java.lang.Object[]) (Method.java:-2)
2020-05-30 18:02:43.851 25578-25578/com.example.sixgroup I/zygote64: at void com.android.internal.os.Zygote$MethodAndArgsCaller.run() (Zygote.java:327)
2020-05-30 18:02:43.851 25578-25578/com.example.sixgroup I/zygote64: at void com.android.internal.os.ZygoteInit.main(java.lang.String[]) (ZygoteInit.java:1374)
2020-05-30 18:02:44.048 25578-25578/com.example.sixgroup A/libc: Fatal signal 11 (SIGSEGV), code 1, fault addr 0x68 in tid 25578 (xample.sixgroup)
