public class MainActivity extends Activity {
 
  private String mName;
 
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
 
    mName = ttdevs;
 
    getString(mName);
    setName(mName);
    showDialog();
    // testError();
  }
 
  public String getString(String name) {
    return hello + name;
  }
 
  public void setName(String name) {
    System.out.println(I'm + name);
  }
 
  private void showDialog() {
    new Handler().postDelayed(new Runnable() {
 
      @Override
      public void run() {
        ScoreAlertDialog.showDialog(MainActivity.this);
      }
    }, 2000);
  }
 
  public static class ScoreAlertDialog {
 
    public static void showDialog(final Activity activity) {
      if (activity.isFinishing()) {
        return;
      }
      try {
        AlertDialog.Builder builder = new AlertDialog.Builder(activity);
        builder.setTitle(alert_title);
        builder.setNegativeButton(cancel, null);
        builder.setPositiveButton(submit, new DialogInterface.OnClickListener() {
          @Override
          public void onClick(DialogInterface dialog, int which) {
            try {
              Toast.makeText(activity, Welcome, Toast.LENGTH_LONG).show();
            } catch (Exception e) {
              e.printStackTrace();
            }
          }
        });
        builder.show();
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
  }
 
  private void testError() {
    try {
      int error = 1 / 0;
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}
 

java.lang.ArithmeticException: divide by zero
  at com.ttdevs.proguard.MainActivity.b(Unknown Source)
  at com.ttdevs.proguard.MainActivity.onCreate(Unknown Source)
  at android.app.Activity.performCreate(Activity.java:4531)
  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1071)
  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2150)
  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2229)
  at android.app.ActivityThread.access$600(ActivityThread.java:139)
  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1261)
  at android.os.Handler.dispatchMessage(Handler.java:99)
  at android.os.Looper.loop(Looper.java:154)
  at android.app.ActivityThread.main(ActivityThread.java:4945)
  at java.lang.reflect.Method.invokeNative(Native Method)
  at java.lang.reflect.Method.invoke(Method.java:511)
  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
  at dalvik.system.NativeStart.main(Native Method)

-optimizationpasses 5
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-dontpreverify
-verbose
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*
 
-keep public class * extends android.app.Activity
-keep public class * extends android.app.Application
-keep public class * extends android.app.Service
-keep public class * extends android.content.BroadcastReceiver
-keep public class * extends android.content.ContentProvider
-keep public class * extends android.app.backup.BackupAgentHelper
-keep public class * extends android.preference.Preference
-keep public class com.android.vending.licensing.ILicensingService
 
-keepclasseswithmembernames class * {
  native <methods>;
}
 
-keepclasseswithmembernames class * {
  public <init>(android.content.Context, android.util.AttributeSet);
}
 
-keepclasseswithmembernames class * {
  public <init>(android.content.Context, android.util.AttributeSet, int);
}
 
-keepclassmembers enum * {
  public static **[] values();
  public static ** valueOf(java.lang.String);
}
 
-keep class * implements android.os.Parcelable {
 public static final android.os.Parcelable$Creator *;
}</init></init></methods>

# -keep public class com.ttdevs.proguard.** { *; }
# -keepclasseswithmembers public class com.ttdevs.proguard.** { *; }
 
-keep public class com.ttdevs.proguard.MainActivity {
  java.lang.String getString(java.lang.String);
}