Merge pull request #1136 from tink2123/android_demo

fix android demo

deploy/android_demo/app/build.gradle

@@ -57,7 +57,7 @@ def archives = [
         ],
         [
                 'src' : 'https://paddleocr.bj.bcebos.com/deploy/lite/ocr_v1_for_cpu.tar.gz',
-                'dest' : 'src/main/assets/models/ocr_v1_for_cpu'
+                'dest' : 'src/main/assets/models'
         ]
 ]
 

deploy/android_demo/app/src/main/java/com/baidu/paddle/lite/demo/ocr/OCRPredictorNative.java

@@ -53,11 +53,18 @@ public class OCRPredictorNative {
 
     }
 
+    public void destory(){
+        if (nativePointer > 0) {
+            release(nativePointer);
+            nativePointer = 0;
+        }
+    }
+
     protected native long init(String detModelPath, String recModelPath,String clsModelPath, int threadNum, String cpuMode);
 
     protected native float[] forward(long pointer, float[] buf, float[] ddims, Bitmap originalImage);
 
-    public native void release(long pointer);
+    protected native void release(long pointer);
 
     private ArrayList<OcrResultModel> postprocess(float[] raw) {
         ArrayList<OcrResultModel> results = new ArrayList<OcrResultModel>();

deploy/android_demo/app/src/main/java/com/baidu/paddle/lite/demo/ocr/Predictor.java

@@ -135,7 +135,7 @@ public class Predictor {
 
     public void releaseModel() {
         if (paddlePredictor != null) {
-            paddlePredictor.release();
+            paddlePredictor.destory();
             paddlePredictor = null;
         }
         isLoaded = false;