Android 致命信號11（SIGSEGV）輪盤教程

Question

我實際上是 Android 的新手和初學者，我遵循了本教程這個輪盤賭我遵循了它並完成了與教程完全相同的所有內容......但該教程已經一年了.. 現在正在使用 Android Studio 最新版本在 JDK Java 8..

這是我的 gradle 構建

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'
}

我的代碼：

*************

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;
    }
}
**************

一切都更新了..所以我不確定為什么會得到

A/libc：致命信號 11 (SIGSEGV)，代碼 1，tid 12075 (xample.sixgroup) 中的故障地址 0x68

日志：

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)

Answer 1

哦，伙計們，我不知道也不確定實際上是什么問題...但是我所做的是刪除依賴項（ButterKnife）並在 OnCreate 中添加我自己的代碼。這使它起作用了？？...首先在日志中它是相同的，但給出 [-2] 這對於字符串區域是不可能的。這可能是可能的問題。

謝謝