Initial commit of our new Android app to demo Skia.

platform_tools/android/apps/viewer/src/main/java/org/skia/viewer/MainActivity.java

Index: platform_tools/android/apps/viewer/src/main/java/org/skia/viewer/MainActivity.java
diff --git a/platform_tools/android/apps/viewer/src/main/java/org/skia/viewer/MainActivity.java b/platform_tools/android/apps/viewer/src/main/java/org/skia/viewer/MainActivity.java
new file mode 100644
index 0000000000000000000000000000000000000000..87ea3e6108edaaba84388ffe2438744d50e3a797
--- /dev/null
+++ b/platform_tools/android/apps/viewer/src/main/java/org/skia/viewer/MainActivity.java
@@ -0,0 +1,52 @@
+package org.skia.viewer;
+
+import android.app.Activity;
+import android.support.v7.app.ActionBarActivity;

[djsollen, 2016/05/06 18:45:26]

This class has been deprecated and I don't think we need to use it since we can
use the actionbar directly.

https://developer.android.com/reference/android/app/ActionBar.html

[liyuqian, 2016/05/06 20:42:30]

Done.

+import android.os.Bundle;
+import android.util.Log;
+import android.view.Surface;
+import android.view.SurfaceHolder;
+import android.view.SurfaceView;
+import android.view.View;
+import android.widget.Button;
+import android.widget.RelativeLayout;
+
+public class MainActivity extends ActionBarActivity implements SurfaceHolder.Callback {
+    private SurfaceView mView;
+    private long mNativeHandle = 0; // the pointer to the native AppThread object
+
+    private native void onSurfaceCreated(long handle, Surface surface);
+    private native void onSurfaceChanged(long handle, Surface surface);
+    private native void onSurfaceDestroyed(long handle);
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        mNativeHandle = ((ViewerApplication) getApplication()).getNativeHandle();

[djsollen, 2016/05/06 18:45:26]

don't store this variable locally when you can just look it up when you need it.
 create a private helper called getNativeAppHandle() and use that where you
currently use mNativeHandle.

[liyuqian, 2016/05/06 20:42:30]

Done.

+        mView = (SurfaceView) findViewById(R.id.surfaceView);
+        mView.getHolder().addCallback(this);
+    }
+
+    @Override
+    public void surfaceCreated(SurfaceHolder holder) {
+        if (mNativeHandle != 0) {
+            onSurfaceCreated(mNativeHandle, holder.getSurface());
+        }
+    }
+
+    @Override
+    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
+        if (mNativeHandle != 0) {
+            onSurfaceChanged(mNativeHandle, holder.getSurface());
+        }
+    }
+
+    @Override
+    public void surfaceDestroyed(SurfaceHolder holder) {
+        if (mNativeHandle != 0) {
+            onSurfaceDestroyed(mNativeHandle);
+        }
+    }
+}