core: update dx to 1.13 for support java 8, build for jdk 8

.gitignore

@@ -13,6 +13,7 @@ out/
 bin/
 target/
 build/
+classes/
 idea/
 .gradle/
 gradle.properties

.travis.yml

 language: java
 jdk:
     - oraclejdk8
-    - oraclejdk7
 
 before_install:
     - chmod +x gradlew

jadx-core/build.gradle

@@ -3,7 +3,7 @@ ext.jadxClasspath = 'clsp-data/android-5.1.jar'
 dependencies {
     runtime files(jadxClasspath)
 
-    compile files('lib/dx.jar')
+    compile files('lib/dx-1.13.jar')
     compile 'commons-io:commons-io:2.4'
     compile 'org.ow2.asm:asm:5.0.3'
     compile 'com.intellij:annotations:12.0'

jadx-core/src/main/java/jadx/core/utils/files/JavaToDex.java

 package jadx.core.utils.files;
 
-import jadx.core.utils.exceptions.JadxException;
-
 import java.io.ByteArrayOutputStream;
-import java.io.PrintStream;
-import java.io.UnsupportedEncodingException;
-import java.lang.reflect.Field;
 
-import com.android.dx.command.DxConsole;
+import com.android.dx.command.dexer.DxContext;
 import com.android.dx.command.dexer.Main;
 import com.android.dx.command.dexer.Main.Arguments;
 
-import static com.android.dx.command.dexer.Main.run;
+import jadx.core.utils.exceptions.JadxException;
+
 import static jadx.core.utils.files.FileUtils.close;
-import static java.lang.System.setOut;
 
 public class JavaToDex {
 
@@ -36,41 +31,22 @@ public class JavaToDex {
 	private String dxErrors;
 
 	public byte[] convert(String javaFile) throws JadxException {
+		ByteArrayOutputStream out = new ByteArrayOutputStream();
 		ByteArrayOutputStream errOut = new ByteArrayOutputStream();
 		try {
-			DxConsole.err = new PrintStream(errOut, true, CHARSET_NAME);
-		} catch (UnsupportedEncodingException e) {
-			throw new JadxException(e.getMessage(), e);
-		}
-		PrintStream oldOut = System.out;
-		ByteArrayOutputStream baos = new ByteArrayOutputStream();
-		try {
-			setOut(new PrintStream(baos, true, CHARSET_NAME));
+			DxContext context = new DxContext(out, errOut);
 			DxArgs args = new DxArgs("-", new String[]{javaFile});
-			resetOutDexVar();
-			run(args);
-		} catch (Throwable e) {
-			throw new JadxException("dx exception: " + e.getMessage(), e);
-		} finally {
-			close(baos);
-			System.setOut(oldOut);
-		}
-		try {
-			// errOut also contains warnings
+			int result = (new Main(context)).runDx(args);
+			if (result != 0) {
+				throw new JadxException("Java to dex conversion error, code: " + result);
+			}
 			dxErrors = errOut.toString(CHARSET_NAME);
-		} catch (UnsupportedEncodingException e) {
-			throw new JadxException("Can't save error output", e);
-		}
-		return baos.toByteArray();
-	}
-
-	private void resetOutDexVar() throws JadxException {
-		try {
-			Field outputDex = Main.class.getDeclaredField("outputDex");
-			outputDex.setAccessible(true);
-			outputDex.set(null, null);
+			return out.toByteArray();
 		} catch (Exception e) {
-			throw new JadxException("Failed to reset outputDex field", e);
+			throw new JadxException("dx exception: " + e.getMessage(), e);
+		} finally {
+			close(out);
+			close(errOut);
 		}
 	}