On x86, ask the user to download Cydia Substrate

.gitignore

@@ -13,6 +13,7 @@ bin/
 gen/
 obj/
 libs/armeabi-v7a/
+libs/x86/
 
 # Local configuration file (sdk path, etc)
 local.properties

res/layout/get_substrate.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="fill_parent"
+    android:layout_height="fill_parent">
+<LinearLayout
+    android:orientation="vertical"
+    android:layout_width="fill_parent"
+    android:layout_height="wrap_content"
+    android:paddingLeft="8dp"
+    android:paddingRight="8dp"
+    android:paddingTop="8dp"
+    android:paddingBottom="8dp">
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/get_substrate_explanation"
+        android:textSize="16sp"/>
+    <Button
+        android:text="@string/get_substrate_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:onClick="downloadClicked"/>
+</LinearLayout>
+</ScrollView>

res/values/strings.xml

@@ -176,5 +176,9 @@ We are working on a fix for this, but in the meantime, BlockLauncher functions a
     <string name="recorder_no_recording">There are no recordings to view.</string>
     <string name="advertising_privacy_policy">Advertising privacy policy</string>
     <string name="about_kamcord_credits">Certain video and audio capture functionality is Powered by Kamcord™ (kamcord.com), and your use of such functionality is subject to the Kamcord Terms of Use (kamcord.com/tos) and Privacy Policy (kamcord.com/privacy)</string>
+
+    <string name="get_substrate_explanation">You need to install the Substrate app to use BlockLauncher. (You do not have to set it up, and you do not need root access: you only need to install it.)</string>
+    <string name="get_substrate_button">Get Substrate</string>
+
     <string name="report_error_title">Oh nose everything broke</string>
 </resources>

src/com/mojang/minecraftpe/MainActivity.java

@@ -54,6 +54,7 @@
 import static net.zhuoweizhang.mcpelauncher.Utils.isSafeMode;
 import net.zhuoweizhang.mcpelauncher.patch.PatchUtils;
 import net.zhuoweizhang.mcpelauncher.ui.AboutAppActivity;
+import net.zhuoweizhang.mcpelauncher.ui.GetSubstrateActivity;
 import net.zhuoweizhang.mcpelauncher.ui.HoverCar;
 import net.zhuoweizhang.mcpelauncher.ui.MainMenuOptionsActivity;
 import net.zhuoweizhang.mcpelauncher.ui.ManagePatchesActivity;
@@ -198,6 +199,9 @@ public void onCreate(Bundle savedInstanceState) {
 			System.exit(0);
 		}
 		hasAlreadyInited = true;
+
+		checkForSubstrate();
+
 		int safeModeCounter = Utils.getPrefs(2).getInt("safe_mode_counter", 0);
 		System.out.println("Current fails: " + safeModeCounter);
 		if (safeModeCounter == MAX_FAILS) {
@@ -1988,6 +1992,37 @@ private void fixMyEpicFail() {
 			prefs.edit().putInt("last_bl_version", myVersion).apply();
 		}
 	}
+
+	private void checkForSubstrate() {
+		if (!Build.CPU_ABI.equals("x86")) return; // we're not on x86
+		PackageInfo substrateInfo = null;
+		try {
+			substrateInfo = this.getPackageManager().getPackageInfo("com.saurik.substrate", 0);
+		} catch (PackageManager.NameNotFoundException e) {
+		}
+		if (substrateInfo == null) {
+			finish();
+			startActivity(new Intent(this, GetSubstrateActivity.class));
+			try {
+				Thread.sleep(100);
+				android.os.Process.killProcess(android.os.Process.myPid());
+			} catch (Throwable t) {
+			}
+			return;
+		}
+		File substrateLibFile = this.getFileStreamPath("libmcpelauncher_tinysubstrate.so");
+		if (!substrateLibFile.exists()) {
+			// copy the substrate lib file over
+			File substrateSourceLibFile = new File(substrateInfo.applicationInfo.nativeLibraryDir, "libsubstrate.so");
+			try {
+				PatchUtils.copy(substrateSourceLibFile, substrateLibFile);
+			} catch (IOException ie) {
+				throw new RuntimeException(ie);
+			}
+		}
+		System.load(substrateLibFile.getAbsolutePath());
+	}
+
 	private class PopupTextWatcher implements TextWatcher, TextView.OnEditorActionListener {
 		public void afterTextChanged(Editable e) {
 			if (BuildConfig.DEBUG)

src/net/zhuoweizhang/mcpelauncher/ui/GetSubstrateActivity.java

@@ -0,0 +1,35 @@
+package net.zhuoweizhang.mcpelauncher.ui;
+
+import android.app.*;
+import android.content.*;
+import android.net.*;
+import android.os.*;
+import android.view.*;
+
+import net.zhuoweizhang.mcpelauncher.*;
+
+public class GetSubstrateActivity extends Activity {
+
+	@Override
+	protected void onCreate(Bundle icicle) {
+		super.onCreate(icicle);
+		setContentView(R.layout.get_substrate);
+	}
+
+	public void downloadClicked(View v) {
+		String url = isPlay()? "market://details?id=com.saurik.substrate" : "http://www.cydiasubstrate.com/";
+		Intent downloadIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
+		downloadIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+		startActivity(downloadIntent);
+		finish();
+	}
+
+	private boolean isPlay() {
+		try {
+			return getPackageManager().getInstallerPackageName(getPackageName()).equals("com.android.vending");
+		} catch (Exception e) {
+			e.printStackTrace();
+			return false;
+		}
+	}
+}