core/java/android/app/NativeActivity.java - platform/frameworks/base - Git at Google

 package android.app;

 import com.android.internal.view.IInputMethodSession;

 import android.content.Context;
 import android.content.pm.ActivityInfo;
 import android.content.pm.PackageManager;
 import android.content.res.AssetManager;
 import android.content.res.Configuration;
 import android.graphics.PixelFormat;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Environment;
 import android.os.Looper;
 import android.os.MessageQueue;
 import android.util.AttributeSet;
 import android.view.InputChannel;
 import android.view.InputQueue;
 import android.view.KeyEvent;
 import android.view.Surface;
 import android.view.SurfaceHolder;
 import android.view.View;
 import android.view.WindowManager;
 import android.view.ViewTreeObserver.OnGlobalLayoutListener;
 import android.view.inputmethod.InputMethodManager;

 import java.io.File;
 import java.lang.ref.WeakReference;

 /**
  * Convenience for implementing an activity that will be implemented
  * purely in native code.  That is, a game (or game-like thing).  There
  * is no need to derive from this class; you can simply declare it in your
  * manifest, and use the NDK APIs from there.
  *
  * <p>A typical manifest would look like:
  *
  * {@sample development/ndk/platforms/android-9/samples/native-activity/AndroidManifest.xml
  *      manifest}
  *
  * <p>A very simple example of native code that is run by NativeActivity
  * follows.  This reads input events from the user and uses OpenGLES to
  * draw into the native activity's window.
  *
  * {@sample development/ndk/platforms/android-9/samples/native-activity/jni/main.c all}
  */
 public class NativeActivity extends Activity implements SurfaceHolder.Callback2,
         InputQueue.Callback, OnGlobalLayoutListener {
     /**
      * Optional meta-that can be in the manifest for this component, specifying
      * the name of the native shared library to load.  If not specified,
      * "main" is used.
      */
     public static final String META_DATA_LIB_NAME = "android.app.lib_name";

     /**
      * Optional meta-that can be in the manifest for this component, specifying
      * the name of the main entry point for this native activity in the
      * {@link #META_DATA_LIB_NAME} native code.  If not specified,
      * "ANativeActivity_onCreate" is used.
      */
     public static final String META_DATA_FUNC_NAME = "android.app.func_name";

     private static final String KEY_NATIVE_SAVED_STATE = "android:native_state";

     private NativeContentView mNativeContentView;
     private InputMethodManager mIMM;
     private InputMethodCallback mInputMethodCallback;

     private int mNativeHandle;

     private InputQueue mCurInputQueue;
     private SurfaceHolder mCurSurfaceHolder;

     final int[] mLocation = new int[2];
     int mLastContentX;
     int mLastContentY;
     int mLastContentWidth;
     int mLastContentHeight;

     private boolean mDispatchingUnhandledKey;

     private boolean mDestroyed;

     private native int loadNativeCode(String path, String funcname, MessageQueue queue,
             String internalDataPath, String obbPath, String externalDataPath, int sdkVersion,
             AssetManager assetMgr, byte[] savedState);
     private native void unloadNativeCode(int handle);

     private native void onStartNative(int handle);
     private native void onResumeNative(int handle);
     private native byte[] onSaveInstanceStateNative(int handle);
     private native void onPauseNative(int handle);
     private native void onStopNative(int handle);
     private native void onConfigurationChangedNative(int handle);
     private native void onLowMemoryNative(int handle);
     private native void onWindowFocusChangedNative(int handle, boolean focused);
     private native void onSurfaceCreatedNative(int handle, Surface surface);
     private native void onSurfaceChangedNative(int handle, Surface surface,
             int format, int width, int height);
     private native void onSurfaceRedrawNeededNative(int handle, Surface surface);
     private native void onSurfaceDestroyedNative(int handle);
     private native void onInputChannelCreatedNative(int handle, InputChannel channel);
     private native void onInputChannelDestroyedNative(int handle, InputChannel channel);
     private native void onContentRectChangedNative(int handle, int x, int y, int w, int h);
     private native void dispatchKeyEventNative(int handle, KeyEvent event);
     private native void finishPreDispatchKeyEventNative(int handle, int seq, boolean handled);

     static class NativeContentView extends View {
         NativeActivity mActivity;

         public NativeContentView(Context context) {
             super(context);
         }

         public NativeContentView(Context context, AttributeSet attrs) {
             super(context, attrs);
         }
     }

     static final class InputMethodCallback implements InputMethodManager.FinishedEventCallback {
         WeakReference<NativeActivity> mNa;

         InputMethodCallback(NativeActivity na) {
             mNa = new WeakReference<NativeActivity>(na);
         }

         @Override
         public void finishedEvent(int seq, boolean handled) {
             NativeActivity na = mNa.get();
             if (na != null) {
                 na.finishPreDispatchKeyEventNative(na.mNativeHandle, seq, handled);
             }
         }
     }

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         String libname = "main";
         String funcname = "ANativeActivity_onCreate";
         ActivityInfo ai;

         mIMM = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
         mInputMethodCallback = new InputMethodCallback(this);

         getWindow().takeSurface(this);
         getWindow().takeInputQueue(this);
         getWindow().setFormat(PixelFormat.RGB_565);
         getWindow().setSoftInputMode(
                 WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED
                 | WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);

         mNativeContentView = new NativeContentView(this);
         mNativeContentView.mActivity = this;
         setContentView(mNativeContentView);
         mNativeContentView.requestFocus();
         mNativeContentView.getViewTreeObserver().addOnGlobalLayoutListener(this);

         try {
             ai = getPackageManager().getActivityInfo(
                     getIntent().getComponent(), PackageManager.GET_META_DATA);
             if (ai.metaData != null) {
                 String ln = ai.metaData.getString(META_DATA_LIB_NAME);
                 if (ln != null) libname = ln;
                 ln = ai.metaData.getString(META_DATA_FUNC_NAME);
                 if (ln != null) funcname = ln;
             }
         } catch (PackageManager.NameNotFoundException e) {
             throw new RuntimeException("Error getting activity info", e);
         }

         String path = null;

         File libraryFile = new File(ai.applicationInfo.nativeLibraryDir,
                 System.mapLibraryName(libname));
         if (libraryFile.exists()) {
             path = libraryFile.getPath();
         }

         if (path == null) {
             throw new IllegalArgumentException("Unable to find native library: " + libname);
         }

         byte[] nativeSavedState = savedInstanceState != null
                 ? savedInstanceState.getByteArray(KEY_NATIVE_SAVED_STATE) : null;

         mNativeHandle = loadNativeCode(path, funcname, Looper.myQueue(),
                  getFilesDir().toString(), getObbDir().toString(),
                  Environment.getExternalStorageAppFilesDirectory(ai.packageName).toString(),
                  Build.VERSION.SDK_INT, getAssets(), nativeSavedState);

         if (mNativeHandle == 0) {
             throw new IllegalArgumentException("Unable to load native library: " + path);
         }
         super.onCreate(savedInstanceState);
     }

     @Override
     protected void onDestroy() {
         mDestroyed = true;
         if (mCurSurfaceHolder != null) {
             onSurfaceDestroyedNative(mNativeHandle);
             mCurSurfaceHolder = null;
         }
         if (mCurInputQueue != null) {
             onInputChannelDestroyedNative(mNativeHandle, mCurInputQueue.getInputChannel());
             mCurInputQueue = null;
         }
         unloadNativeCode(mNativeHandle);
         super.onDestroy();
     }

     @Override
     protected void onPause() {
         super.onPause();
         onPauseNative(mNativeHandle);
     }

     @Override
     protected void onResume() {
         super.onResume();
         onResumeNative(mNativeHandle);
     }

     @Override
     protected void onSaveInstanceState(Bundle outState) {
         super.onSaveInstanceState(outState);
         byte[] state = onSaveInstanceStateNative(mNativeHandle);
         if (state != null) {
             outState.putByteArray(KEY_NATIVE_SAVED_STATE, state);
         }
     }

     @Override
     protected void onStart() {
         super.onStart();
         onStartNative(mNativeHandle);
     }

     @Override
     protected void onStop() {
         super.onStop();
         onStopNative(mNativeHandle);
     }

     @Override
     public void onConfigurationChanged(Configuration newConfig) {
         super.onConfigurationChanged(newConfig);
         if (!mDestroyed) {
             onConfigurationChangedNative(mNativeHandle);
         }
     }

     @Override
     public void onLowMemory() {
         super.onLowMemory();
         if (!mDestroyed) {
             onLowMemoryNative(mNativeHandle);
         }
     }

     @Override
     public void onWindowFocusChanged(boolean hasFocus) {
         super.onWindowFocusChanged(hasFocus);
         if (!mDestroyed) {
             onWindowFocusChangedNative(mNativeHandle, hasFocus);
         }
     }

     @Override
     public boolean dispatchKeyEvent(KeyEvent event) {
         if (mDispatchingUnhandledKey) {
             return super.dispatchKeyEvent(event);
         } else {
             // Key events from the IME do not go through the input channel;
             // we need to intercept them here to hand to the application.
             dispatchKeyEventNative(mNativeHandle, event);
             return true;
         }
     }

     public void surfaceCreated(SurfaceHolder holder) {
         if (!mDestroyed) {
             mCurSurfaceHolder = holder;
             onSurfaceCreatedNative(mNativeHandle, holder.getSurface());
         }
     }

     public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
         if (!mDestroyed) {
             mCurSurfaceHolder = holder;
             onSurfaceChangedNative(mNativeHandle, holder.getSurface(), format, width, height);
         }
     }

     public void surfaceRedrawNeeded(SurfaceHolder holder) {
         if (!mDestroyed) {
             mCurSurfaceHolder = holder;
             onSurfaceRedrawNeededNative(mNativeHandle, holder.getSurface());
         }
     }

     public void surfaceDestroyed(SurfaceHolder holder) {
         mCurSurfaceHolder = null;
         if (!mDestroyed) {
             onSurfaceDestroyedNative(mNativeHandle);
         }
     }

     public void onInputQueueCreated(InputQueue queue) {
         if (!mDestroyed) {
             mCurInputQueue = queue;
             onInputChannelCreatedNative(mNativeHandle, queue.getInputChannel());
         }
     }

     public void onInputQueueDestroyed(InputQueue queue) {
         mCurInputQueue = null;
         if (!mDestroyed) {
             onInputChannelDestroyedNative(mNativeHandle, queue.getInputChannel());
         }
     }

     public void onGlobalLayout() {
         mNativeContentView.getLocationInWindow(mLocation);
         int w = mNativeContentView.getWidth();
         int h = mNativeContentView.getHeight();
         if (mLocation[0] != mLastContentX || mLocation[1] != mLastContentY
                 || w != mLastContentWidth || h != mLastContentHeight) {
             mLastContentX = mLocation[0];
             mLastContentY = mLocation[1];
             mLastContentWidth = w;
             mLastContentHeight = h;
             if (!mDestroyed) {
                 onContentRectChangedNative(mNativeHandle, mLastContentX,
                         mLastContentY, mLastContentWidth, mLastContentHeight);
             }
         }
     }

     boolean dispatchUnhandledKeyEvent(KeyEvent event) {
         try {
             mDispatchingUnhandledKey = true;
             View decor = getWindow().getDecorView();
             if (decor != null) {
                 return decor.dispatchKeyEvent(event);
             } else {
                 return false;
             }
         } finally {
             mDispatchingUnhandledKey = false;
         }
     }

     void preDispatchKeyEvent(KeyEvent event, int seq) {
         mIMM.dispatchKeyEvent(this, seq, event,
                 mInputMethodCallback);
     }

     void setWindowFlags(int flags, int mask) {
         getWindow().setFlags(flags, mask);
     }

     void setWindowFormat(int format) {
         getWindow().setFormat(format);
     }

     void showIme(int mode) {
         mIMM.showSoftInput(mNativeContentView, mode);
     }

     void hideIme(int mode) {
         mIMM.hideSoftInputFromWindow(mNativeContentView.getWindowToken(), mode);
     }
 }
	package android.app;

	import com.android.internal.view.IInputMethodSession;

	import android.content.Context;
	import android.content.pm.ActivityInfo;
	import android.content.pm.PackageManager;
	import android.content.res.AssetManager;
	import android.content.res.Configuration;
	import android.graphics.PixelFormat;
	import android.os.Build;
	import android.os.Bundle;
	import android.os.Environment;
	import android.os.Looper;
	import android.os.MessageQueue;
	import android.util.AttributeSet;
	import android.view.InputChannel;
	import android.view.InputQueue;
	import android.view.KeyEvent;
	import android.view.Surface;
	import android.view.SurfaceHolder;
	import android.view.View;
	import android.view.WindowManager;
	import android.view.ViewTreeObserver.OnGlobalLayoutListener;
	import android.view.inputmethod.InputMethodManager;

	import java.io.File;
	import java.lang.ref.WeakReference;

	/**
	* Convenience for implementing an activity that will be implemented
	* purely in native code. That is, a game (or game-like thing). There
	* is no need to derive from this class; you can simply declare it in your
	* manifest, and use the NDK APIs from there.
	*
	* <p>A typical manifest would look like:
	*
	* {@sample development/ndk/platforms/android-9/samples/native-activity/AndroidManifest.xml
	* manifest}
	*
	* <p>A very simple example of native code that is run by NativeActivity
	* follows. This reads input events from the user and uses OpenGLES to
	* draw into the native activity's window.
	*
	* {@sample development/ndk/platforms/android-9/samples/native-activity/jni/main.c all}
	*/
	public class NativeActivity extends Activity implements SurfaceHolder.Callback2,
	InputQueue.Callback, OnGlobalLayoutListener {
	/**
	* Optional meta-that can be in the manifest for this component, specifying
	* the name of the native shared library to load. If not specified,
	* "main" is used.
	*/
	public static final String META_DATA_LIB_NAME = "android.app.lib_name";

	/**
	* Optional meta-that can be in the manifest for this component, specifying
	* the name of the main entry point for this native activity in the
	* {@link #META_DATA_LIB_NAME} native code. If not specified,
	* "ANativeActivity_onCreate" is used.
	*/
	public static final String META_DATA_FUNC_NAME = "android.app.func_name";

	private static final String KEY_NATIVE_SAVED_STATE = "android:native_state";

	private NativeContentView mNativeContentView;
	private InputMethodManager mIMM;
	private InputMethodCallback mInputMethodCallback;

	private int mNativeHandle;

	private InputQueue mCurInputQueue;
	private SurfaceHolder mCurSurfaceHolder;

	final int[] mLocation = new int[2];
	int mLastContentX;
	int mLastContentY;
	int mLastContentWidth;
	int mLastContentHeight;

	private boolean mDispatchingUnhandledKey;

	private boolean mDestroyed;

	private native int loadNativeCode(String path, String funcname, MessageQueue queue,
	String internalDataPath, String obbPath, String externalDataPath, int sdkVersion,
	AssetManager assetMgr, byte[] savedState);
	private native void unloadNativeCode(int handle);

	private native void onStartNative(int handle);
	private native void onResumeNative(int handle);
	private native byte[] onSaveInstanceStateNative(int handle);
	private native void onPauseNative(int handle);
	private native void onStopNative(int handle);
	private native void onConfigurationChangedNative(int handle);
	private native void onLowMemoryNative(int handle);
	private native void onWindowFocusChangedNative(int handle, boolean focused);
	private native void onSurfaceCreatedNative(int handle, Surface surface);
	private native void onSurfaceChangedNative(int handle, Surface surface,
	int format, int width, int height);
	private native void onSurfaceRedrawNeededNative(int handle, Surface surface);
	private native void onSurfaceDestroyedNative(int handle);
	private native void onInputChannelCreatedNative(int handle, InputChannel channel);
	private native void onInputChannelDestroyedNative(int handle, InputChannel channel);
	private native void onContentRectChangedNative(int handle, int x, int y, int w, int h);
	private native void dispatchKeyEventNative(int handle, KeyEvent event);
	private native void finishPreDispatchKeyEventNative(int handle, int seq, boolean handled);

	static class NativeContentView extends View {
	NativeActivity mActivity;

	public NativeContentView(Context context) {
	super(context);
	}

	public NativeContentView(Context context, AttributeSet attrs) {
	super(context, attrs);
	}
	}

	static final class InputMethodCallback implements InputMethodManager.FinishedEventCallback {
	WeakReference<NativeActivity> mNa;

	InputMethodCallback(NativeActivity na) {
	mNa = new WeakReference<NativeActivity>(na);
	}

	@Override
	public void finishedEvent(int seq, boolean handled) {
	NativeActivity na = mNa.get();
	if (na != null) {
	na.finishPreDispatchKeyEventNative(na.mNativeHandle, seq, handled);
	}
	}
	}

	@Override
	protected void onCreate(Bundle savedInstanceState) {
	String libname = "main";
	String funcname = "ANativeActivity_onCreate";
	ActivityInfo ai;

	mIMM = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
	mInputMethodCallback = new InputMethodCallback(this);

	getWindow().takeSurface(this);
	getWindow().takeInputQueue(this);
	getWindow().setFormat(PixelFormat.RGB_565);
	getWindow().setSoftInputMode(
	WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED
	\| WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);

	mNativeContentView = new NativeContentView(this);
	mNativeContentView.mActivity = this;
	setContentView(mNativeContentView);
	mNativeContentView.requestFocus();
	mNativeContentView.getViewTreeObserver().addOnGlobalLayoutListener(this);

	try {
	ai = getPackageManager().getActivityInfo(
	getIntent().getComponent(), PackageManager.GET_META_DATA);
	if (ai.metaData != null) {
	String ln = ai.metaData.getString(META_DATA_LIB_NAME);
	if (ln != null) libname = ln;
	ln = ai.metaData.getString(META_DATA_FUNC_NAME);
	if (ln != null) funcname = ln;
	}
	} catch (PackageManager.NameNotFoundException e) {
	throw new RuntimeException("Error getting activity info", e);
	}

	String path = null;

	File libraryFile = new File(ai.applicationInfo.nativeLibraryDir,
	System.mapLibraryName(libname));
	if (libraryFile.exists()) {
	path = libraryFile.getPath();
	}

	if (path == null) {
	throw new IllegalArgumentException("Unable to find native library: " + libname);
	}

	byte[] nativeSavedState = savedInstanceState != null
	? savedInstanceState.getByteArray(KEY_NATIVE_SAVED_STATE) : null;

	mNativeHandle = loadNativeCode(path, funcname, Looper.myQueue(),
	getFilesDir().toString(), getObbDir().toString(),
	Environment.getExternalStorageAppFilesDirectory(ai.packageName).toString(),
	Build.VERSION.SDK_INT, getAssets(), nativeSavedState);

	if (mNativeHandle == 0) {
	throw new IllegalArgumentException("Unable to load native library: " + path);
	}
	super.onCreate(savedInstanceState);
	}

	@Override
	protected void onDestroy() {
	mDestroyed = true;
	if (mCurSurfaceHolder != null) {
	onSurfaceDestroyedNative(mNativeHandle);
	mCurSurfaceHolder = null;
	}
	if (mCurInputQueue != null) {
	onInputChannelDestroyedNative(mNativeHandle, mCurInputQueue.getInputChannel());
	mCurInputQueue = null;
	}
	unloadNativeCode(mNativeHandle);
	super.onDestroy();
	}

	@Override
	protected void onPause() {
	super.onPause();
	onPauseNative(mNativeHandle);
	}

	@Override
	protected void onResume() {
	super.onResume();
	onResumeNative(mNativeHandle);
	}

	@Override
	protected void onSaveInstanceState(Bundle outState) {
	super.onSaveInstanceState(outState);
	byte[] state = onSaveInstanceStateNative(mNativeHandle);
	if (state != null) {
	outState.putByteArray(KEY_NATIVE_SAVED_STATE, state);
	}
	}

	@Override
	protected void onStart() {
	super.onStart();
	onStartNative(mNativeHandle);
	}

	@Override
	protected void onStop() {
	super.onStop();
	onStopNative(mNativeHandle);
	}

	@Override
	public void onConfigurationChanged(Configuration newConfig) {
	super.onConfigurationChanged(newConfig);
	if (!mDestroyed) {
	onConfigurationChangedNative(mNativeHandle);
	}
	}

	@Override
	public void onLowMemory() {
	super.onLowMemory();
	if (!mDestroyed) {
	onLowMemoryNative(mNativeHandle);
	}
	}

	@Override
	public void onWindowFocusChanged(boolean hasFocus) {
	super.onWindowFocusChanged(hasFocus);
	if (!mDestroyed) {
	onWindowFocusChangedNative(mNativeHandle, hasFocus);
	}
	}

	@Override
	public boolean dispatchKeyEvent(KeyEvent event) {
	if (mDispatchingUnhandledKey) {
	return super.dispatchKeyEvent(event);
	} else {
	// Key events from the IME do not go through the input channel;
	// we need to intercept them here to hand to the application.
	dispatchKeyEventNative(mNativeHandle, event);
	return true;
	}
	}

	public void surfaceCreated(SurfaceHolder holder) {
	if (!mDestroyed) {
	mCurSurfaceHolder = holder;
	onSurfaceCreatedNative(mNativeHandle, holder.getSurface());
	}
	}

	public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
	if (!mDestroyed) {
	mCurSurfaceHolder = holder;
	onSurfaceChangedNative(mNativeHandle, holder.getSurface(), format, width, height);
	}
	}

	public void surfaceRedrawNeeded(SurfaceHolder holder) {
	if (!mDestroyed) {
	mCurSurfaceHolder = holder;
	onSurfaceRedrawNeededNative(mNativeHandle, holder.getSurface());
	}
	}

	public void surfaceDestroyed(SurfaceHolder holder) {
	mCurSurfaceHolder = null;
	if (!mDestroyed) {
	onSurfaceDestroyedNative(mNativeHandle);
	}
	}

	public void onInputQueueCreated(InputQueue queue) {
	if (!mDestroyed) {
	mCurInputQueue = queue;
	onInputChannelCreatedNative(mNativeHandle, queue.getInputChannel());
	}
	}

	public void onInputQueueDestroyed(InputQueue queue) {
	mCurInputQueue = null;
	if (!mDestroyed) {
	onInputChannelDestroyedNative(mNativeHandle, queue.getInputChannel());
	}
	}

	public void onGlobalLayout() {
	mNativeContentView.getLocationInWindow(mLocation);
	int w = mNativeContentView.getWidth();
	int h = mNativeContentView.getHeight();
	if (mLocation[0] != mLastContentX \|\| mLocation[1] != mLastContentY
	\|\| w != mLastContentWidth \|\| h != mLastContentHeight) {
	mLastContentX = mLocation[0];
	mLastContentY = mLocation[1];
	mLastContentWidth = w;
	mLastContentHeight = h;
	if (!mDestroyed) {
	onContentRectChangedNative(mNativeHandle, mLastContentX,
	mLastContentY, mLastContentWidth, mLastContentHeight);
	}
	}
	}

	boolean dispatchUnhandledKeyEvent(KeyEvent event) {
	try {
	mDispatchingUnhandledKey = true;
	View decor = getWindow().getDecorView();
	if (decor != null) {
	return decor.dispatchKeyEvent(event);
	} else {
	return false;
	}
	} finally {
	mDispatchingUnhandledKey = false;
	}
	}

	void preDispatchKeyEvent(KeyEvent event, int seq) {
	mIMM.dispatchKeyEvent(this, seq, event,
	mInputMethodCallback);
	}

	void setWindowFlags(int flags, int mask) {
	getWindow().setFlags(flags, mask);
	}

	void setWindowFormat(int format) {
	getWindow().setFormat(format);
	}

	void showIme(int mode) {
	mIMM.showSoftInput(mNativeContentView, mode);
	}

	void hideIme(int mode) {
	mIMM.hideSoftInputFromWindow(mNativeContentView.getWindowToken(), mode);
	}
	}