From f6c8fdf93ee7fc4edff43d50769ac68ca47be71d Mon Sep 17 00:00:00 2001
From: Dan Watling <dan@synaptik.com>
Date: Sat, 16 Jan 2016 05:17:47 -0600
Subject: [PATCH] - Fixed issue #5. Empty results will generate a nice message.

---
 .../com/danwatling/apkdecompiler/adb/Adb.java | 32 +++++++++----------
 .../apkdecompiler/steps/FetchApk.java         | 23 ++++++-------
 2 files changed, 28 insertions(+), 27 deletions(-)

diff --git a/src/main/java/com/danwatling/apkdecompiler/adb/Adb.java b/src/main/java/com/danwatling/apkdecompiler/adb/Adb.java
index ca8634d..7618750 100644
--- a/src/main/java/com/danwatling/apkdecompiler/adb/Adb.java
+++ b/src/main/java/com/danwatling/apkdecompiler/adb/Adb.java
@@ -81,26 +81,26 @@ private boolean exec(String command) {
 	}
 
 	public List<AndroidPackage> listPackages(String filter) {
-		if (!exec("pm list packages -3 -f " + filter)) {
-			return null;
-		}
-		String output = getProcessOutput(process.getInputStream());
-		BufferedReader reader = new BufferedReader(new StringReader(output));
-		Logger.info(output);
-
 		List<AndroidPackage> result = new ArrayList<>();
-		String line;
-		try {
-			while ((line = reader.readLine()) != null) {
-				if (line.trim().length() > 0) {
-					AndroidPackage pkg = new AndroidPackage(line);
-					if (pkg.getPath() != null) {
-						result.add(pkg);
+
+		if (exec("pm list packages -3 -f " + filter)) {
+			String output = getProcessOutput(process.getInputStream());
+			BufferedReader reader = new BufferedReader(new StringReader(output));
+			Logger.info(output);
+
+			String line;
+			try {
+				while ((line = reader.readLine()) != null) {
+					if (line.trim().length() > 0) {
+						AndroidPackage pkg = new AndroidPackage(line);
+						if (pkg.getPath() != null) {
+							result.add(pkg);
+						}
 					}
 				}
+			} catch (IOException ex) {
+				Logger.error("Unable to process output of 'pm list packages'", ex);
 			}
-		} catch (IOException ex) {
-			Logger.error("Unable to process output of 'pm list packages'", ex);
 		}
 		return result;
 	}
diff --git a/src/main/java/com/danwatling/apkdecompiler/steps/FetchApk.java b/src/main/java/com/danwatling/apkdecompiler/steps/FetchApk.java
index f076de3..894ecff 100644
--- a/src/main/java/com/danwatling/apkdecompiler/steps/FetchApk.java
+++ b/src/main/java/com/danwatling/apkdecompiler/steps/FetchApk.java
@@ -26,22 +26,23 @@ public FetchApk(File workFolder, String filter, File apkFile) {
 	}
 
 	public boolean run() {
-		boolean result = true;
+		boolean result = false;
 
 		try {
 			List<AndroidPackage> packages = adb.listPackages(this.filter);
-			if (packages == null) {
-				return false;
-			}
-
-			if (packages.size() > 1) {
-				Logger.info("Found " + packages.size() + " applications that match: " + this.filter);
-				for (AndroidPackage p : packages) {
-					Logger.info("\t" + p.getPath() + " - " + p.getPackage());
+			if (packages.size() > 0) {
+				if (packages.size() > 1) {
+					Logger.info("Found " + packages.size() + " applications that match: " + this.filter);
+					for (AndroidPackage p : packages) {
+						Logger.info("\t" + p.getPath() + " - " + p.getPackage());
+					}
 				}
-			}
 
-			adb.pull(packages.get(0), this.apkFile);
+				adb.pull(packages.get(0), this.apkFile);
+				result = true;
+			} else {
+				Logger.info("No applications matched '" + this.filter + "'");
+			}
 		} finally {
 			adb.exit();
 		}