java - 我的 android 代码可以在 Android 2.2 上成功运行，但是不能在 Android 4.2.2 上运行

Question

我的Android项目是一个YUV播放器起初项目在Android 2.2版本下可以正常运行但是当我想要它也可以在 Android 4.2.2 上工作发生了一些问题

仍然可以顺利运行，没有报错信息然而 YUV 图像的内容并没有显示在屏幕上屏幕内容只是 block 这是我的 Java 代码，它接收来自 JNI 的 YUV 数据，并显示内容:

public class SkiaView extends SurfaceView implements SurfaceHolder.Callback
{
private SurfaceHolder holder=null;//******Version2******//
private static final String TAG = "skiademo";

private int mSampleId = 0;
final Rect rect = new Rect(0, 0, 352, 288);  

int FrameNum=0;

static 
{
    System.loadLibrary("SkiaDemo");
}

public native void renderHello(Canvas canvas, int FrameNum,Rect rect);
public native void renderText(Canvas canvas);

public SkiaView(Context context,AttributeSet attr)//******Version2******//
{
       super(context,attr);
       // TODO Auto-generated constructor stub
       holder=getHolder();
       holder.addCallback(this);
}

public void surfaceCreated(SurfaceHolder holder)//******Version2******//
{
       // TODO Auto-generated method stub
       new Thread(new MyLoop()).start();
}

class MyLoop implements Runnable//******Version2******//
{
    public void run() {
        // TODO Auto-generated method stub
        while(true){
            try{
                Canvas c=holder.lockCanvas();
                if(FrameNum == 15)
                {
                    FrameNum = 0;
                    renderHello(c, FrameNum,rect);
                    //c.drawColor(Color.BLUE);
                }
                else
                {
                    FrameNum = FrameNum + 1;
                    renderHello(c, FrameNum,rect);
                    //c.drawColor(Color.BLUE);
                }
                holder.unlockCanvasAndPost(c);
                Thread.sleep(1);
                }catch(Exception e)
                {

                }
            }
        }
    }

public void surfaceChanged(SurfaceHolder holder, int format, int width,
        int height) {
    // TODO Auto-generated method stub

}
public void surfaceDestroyed(SurfaceHolder holder) {
    // TODO Auto-generated method stub

}

下面是我读取YUV内容的代码并将其返回给 JAVA

#include "SkiaDemoJni.h"
#include "mylog.h"

#include "GraphicsJNI.h"
#include "SkPaint.h"
#include "SkCanvas.h"

#include"opj_includes.h"
#include <wchar.h>
#include <android\log.h> 
#include <android\bitmap.h>

#define two_pi (6.283)

unsigned char cur_image_y[101376];
unsigned char cur_image_u[101376];
unsigned char cur_image_v[101376];

inline int32_t color(int32_t pColorY,int32_t pColorU,int32_t pColorV) {
  int32_t pColorR;
  int32_t pColorG;
  int32_t pColorB;
  pColorR = pColorY+1.4075*(pColorV-128);
  pColorG = pColorY-0.3455*(pColorU-128)-0.7169*(pColorV-128);
  pColorB = pColorY+1.7790*(pColorU-128);
  if(pColorR>255)
   pColorR=255;
  if(pColorG>255)
   pColorG=255;
  if(pColorB>255)
   pColorB=255;   

  if(pColorR<0)
   pColorR=0;
  if(pColorG<0)
   pColorG=0;
  if(pColorB<0)
   pColorB=0;     

   return 0xFF000000 | ((pColorB << 16) & 0x00FF0000) | ((pColorG << 8) & 0x0000FF00) |       
   ((pColorR) & 0x000000FF);
   }
void Java_com_whtr_example_skiademo_SkiaView_renderHello(JNIEnv *env, jobject thizz,     
jobject canvas, jint FrameNum,jobject rect)
{   
jclass bitmapConfig = env->FindClass("android/graphics/Bitmap$Config");
jfieldID rgb565FieldID = env->GetStaticFieldID(bitmapConfig, "ARGB_8888",   
"Landroid/graphics/Bitmap$Config;");
jobject rgb565Obj = env->GetStaticObjectField(bitmapConfig, rgb565FieldID); 
LOGD("jclass bitmapClass ");
jclass bitmapClass = env->FindClass("android/graphics/Bitmap");
jmethodID createBitmapMethodID = env->GetStaticMethodID(bitmapClass,"createBitmap", 
 "(IILandroid/graphics/Bitmap$Config;)Landroid/graphics/Bitmap;");
jobject bitmapObj = env->CallStaticObjectMethod(bitmapClass, createBitmapMethodID,  
 352, 288, rgb565Obj);//width,height 
int a[101376]={0};
AndroidBitmapInfo   info;   
int*                pixels;
 int                ret;    
 ret = AndroidBitmap_getInfo(env, bitmapObj, &info);    
 ret = AndroidBitmap_lockPixels(env, bitmapObj, (void**)&pixels);       
 int                width=(int)info.width;  
 int                height=(int)info.height;
 SkBitmap bmp = SkBitmap();  
 bmp.setConfig(SkBitmap::kARGB_8888_Config,width,height);   
 bmp.setPixels((void*)pixels);
SkCanvas background(bmp);
SkCanvas* canv = GraphicsJNI::getNativeCanvas(env, canvas);
if (!canv)
{
    LOGE("!canv");
    return;
} 
systemPara sys;   

  sys.width = 352;

  sys.height = 288;
  sys.frameNO = 1;
  sys.startFrm = 0;
sys.inFileName = new char[strlen("/mnt/sdcard/out_352x288_P420_final.yuv")+1];
   strcpy(sys.inFileName, "/mnt/sdcard/out_352x288_P420_final.yuv");
for(int i=0;i<sys.frameNO;i++){
    //sys.startFrm = i;
    YUV_play_read(cur_image_y, cur_image_u, cur_image_v, sys.inFileName, sys.width, sys.height, FrameNum);
    for(int x=0;x<sys.width;x++){
        for(int y=0;y<sys.height;y++){
            a[x + y * 352] = color(cur_image_y[x + y * 352], cur_image_u[x + y * 352], cur_image_v[x + y * 352]);
        }
    }
}  
pixels = a;
AndroidBitmap_unlockPixels(env, bitmapObj);
bmp.setPixels((void*)pixels);
canv->drawBitmap(bmp, 0, 0, NULL);

  }

以下是我的AndroidManifest.xml文件:

   <?xml version="1.0" encoding="utf-8"?>
   <manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.whtr.example.skiademo"
    android:versionCode="1"
    android:versionName="1.0">

   <uses-sdk android:minSdkVersion="8"
             android:targetSdkVersion="17"></uses-sdk>
         <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>  
         <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>  
    <application android:icon="@drawable/icon" android:label="@string/app_name">
    <activity android:name=".MainActivity"
              android:label="@string/app_name">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    </application>


</manifest> 

下面是我的Application.mk
APP_PLATFORM := android-8

Answer 1

进入 AndroidManifest.xml 并用以下标记替换您的 uses-sdk 标记

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="17" />

如需更多帮助，请访问 http://developer.android.com/about/versions/android-4.2.html