Android 如何使用fileinputstream在listView中填充imageview

我使用FileoutputStream将相机图像输出到SD卡，然后我想使用fileInputStream在listView中填充imageView。这是我的代码注释，我已经更改了一台计算机的路径，以便与仿真器一起使用

public class CameraAPI extends Activity implements SurfaceHolder.Callback{

public Camera camera;
MediaRecorder mediaRecorder;
CBDataBaseHelper RH;
TextView RecipeID;

public void onCreate (Bundle savedInstanceState){
    boolean diditwork;
    try{

    super.onCreate(savedInstanceState);
    setContentView(R.layout.camera);

    RecipeID = (TextView)findViewById(R.id.Rid2);
    String RowID;
    Bundle extras = getIntent().getExtras();    
    RowID = extras.getString("SELECTED2");
    RecipeID.setText(RowID);
    SurfaceView surface = (SurfaceView)findViewById(R.id.acccam);
    SurfaceHolder holder = surface.getHolder();
    holder.addCallback(this);
    holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}catch(Exception e){
    diditwork = false;
    String error = e.toString();
    Dialog d = new Dialog(this);
    d.setTitle("darn");
    TextView tv = new TextView(this);
    tv.setText(error);
    d.setContentView(tv);
    d.show();
}}

        public void takePhoto(View view){
            //String ID = RecipeID.getText().toString();
            //Long LID = Long.parseLong(ID);
            boolean diditwork;
            try{
            takePicture();
            }catch(Exception e){
                diditwork = false;
                String error = e.toString();
                Dialog d = new Dialog(this);
                d.setTitle("darn");
                TextView tv = new TextView(this);
                tv.setText(error);
                d.setContentView(tv);
                d.show();
            }
            //String path = "/sdcard/Image.jpg";
            //RH.updateRecipe3(LID,path);

    }




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

}



public void surfaceCreated(SurfaceHolder holder) {
    // TODO Auto-generated method stub
    if (mediaRecorder == null){
        try{
            camera = camera.open();
            camera.setPreviewDisplay(holder);
            camera.startPreview();

        }catch (IOException e){
            Log.d("CAMERA", e.getMessage());
        }

    }
}



public void surfaceDestroyed(SurfaceHolder holder) {
    // TODO Auto-generated method stub
    camera.stopPreview();
    camera.release();
}

public void takePicture(){
boolean diditwork;
    try{
    camera.takePicture(shutterCallback, rawCallback, jpegCallback);
    }catch(Exception e){
        diditwork = false;
        String error = e.toString();
        Dialog d = new Dialog(this);
        d.setTitle("darn");
        TextView tv = new TextView(this);
        tv.setText(error);
        d.setContentView(tv);
        d.show();
    }
}


ShutterCallback shutterCallback= new ShutterCallback()
{
    public void onShutter(){

    }
};

    PictureCallback rawCallback = new PictureCallback(){
        public void onPictureTaken(byte[] data, Camera camera){

        }
    };

    PictureCallback jpegCallback = new PictureCallback(){
        public void onPictureTaken(byte[] data, Camera camera){
            FileOutputStream outStream = null;

            try{
                outStream = new FileOutputStream("//STEFAN-PC/Users/stefan/Desktop/Uni Work/Image.jpg");
                outStream.write(data);
                outStream.close();
            }catch(FileNotFoundException e){
                Log.d("CAMERA", e.getMessage());
            }catch(IOException e){
                Log.d("CAMERA",e.getMessage());
            }
                /*RH = new CBDataBaseHelper(CameraAPI.this);
                RH.open();
                String ID = RecipeID.getText().toString();
                Long RID = Long.parseLong(ID);
                RH.updateRecipe3(RID, data);
                RH.close();*/
            String ID = RecipeID.getText().toString();
            Long RID = Long.parseLong(ID);
            RH.updateRecipe3(RID, "/sdcard/Image.jpg");
            }







};
}

这是我的代码，关于我在哪里填充listView，有人能给我一个指针或布局代码片段，告诉我如何将图像加载到imageView中吗

public class CBFilter extends ListActivity {

ListView RecipeNames;
Cursor cursor;
SimpleCursorAdapter adapter;
CBDataBaseHelper data;
SQLiteDatabase data2;
TextView RecipeText, RowId;
String[] from = { CBDataBaseHelper.KEY_NAME};
int[] to = { R.id.row};
ImageView image;
byte[] dataImage;

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);
setContentView(R.layout.main);
boolean diditwork;
try{

//java.io.FileInputStream in = openFileInput("myImage.jpg");
RecipeNames = (ListView) findViewById(android.R.id.list);
RecipeNames.setTextFilterEnabled(true);
RecipeText = (TextView) findViewById(R.id.recipeText);
adapter = new SimpleCursorAdapter (this, 0, cursor, null, null);
image = (ImageView) findViewById(R.id.RecipeImage);

data = new CBDataBaseHelper(this);
data.open();
cursor = data.query();
startManagingCursor(cursor);
adapter = new SimpleCursorAdapter(this, R.layout.row, cursor, from, to);
RecipeNames.setAdapter(adapter);
adapter.notifyDataSetChanged();




}catch(Exception e){
diditwork = false;
String error = e.toString();
Dialog d = new Dialog(this);
d.setTitle("darn");
TextView tv = new TextView(this);
tv.setText(error);
d.setContentView(tv);
d.show();
}}

public void CreateNew(View view){

    Intent myIntent = new Intent(this, CBCreate.class);
    startActivity(myIntent);
}

@Override
public void onListItemClick(ListView parent, View v, int position, long id) {
    super.onListItemClick(parent, v, position, id);
    Intent intent1 = new Intent(this, CBCreate.class);
    long rowId = cursor.getLong(cursor.getColumnIndex(CBDataBaseHelper.KEY_ROWID));
    String s = String.valueOf(rowId);
    intent1.putExtra("SELECTED", s);
    startActivity(intent1);
}


}

---

谢谢Stefan

将ImageView设置为在SD卡中显示图像

ImageView imageView;
Bitmap bmp = BitmapFactory.decodeFile(imagePath);
imageView.setImageBitmap(bmp);

但是，如果要在ListView中显示ImageView，则必须为ListView定义自己的适配器，最好使用View Holder模式来提高性能

public class MyArrayAdapter extends ArrayAdapter<String> {
    private final Activity context;
    private final String[] names;

    public MyArrayAdapter(Activity context, String[] names) {
        super(context, R.layout.rowlayout, names);
        this.context = context;
        this.names = names;
    }

    // static to save the reference to the outer class and to avoid access to
    // any members of the containing class
    static class ViewHolder {
        public ImageView imageView;
        public TextView textView;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // ViewHolder will buffer the assess to the individual fields of the row
        // layout

        ViewHolder holder;
        // Recycle existing view if passed as parameter
        // This will save memory and time on Android
        // This only works if the base layout for all classes are the same
        View rowView = convertView;
        if (rowView == null) {
            LayoutInflater inflater = context.getLayoutInflater();
            rowView = inflater.inflate(R.layout.rowlayout, null, true);
            holder = new ViewHolder();
            holder.textView = (TextView) rowView.findViewById(R.id.label);
            holder.imageView = (ImageView) rowView.findViewById(R.id.icon);
            rowView.setTag(holder);
        } else {
            holder = (ViewHolder) rowView.getTag();
        }

        holder.textView.setText(names[position]);
        // Change the icon for Windows and iPhone
        String s = names[position];

        Bitmap bmp = BitmapFactory.decodeFile(imagePath);
        holder.imageView.setImageBitmap(bmp);           

        return rowView;
    }
}

公共类MyArrayAdapter扩展了ArrayAdapter{
私人最终活动背景；
私有最终字符串[]名称；
公共MyArrayAdapter（活动上下文，字符串[]名称）{
super（上下文、R.layout.rowlayout、名称）；
this.context=上下文；
this.names=名称；
}
//static保存对外部类的引用并避免访问
//包含类的任何成员
静态类视窗夹{
公共影像视图；
公共文本视图文本视图；
}
@凌驾
公共视图getView（int位置、视图转换视图、视图组父视图）{
//ViewHolder会将评估缓冲到行的各个字段
//布局
视窗座；
//如果作为参数传递，则回收现有视图
//这将节省Android上的内存和时间
//仅当所有类的基本布局相同时，此选项才有效
视图行视图=转换视图；
if（rowView==null）{
LayoutInflater充气器=上下文。getLayoutInflater（）；
rowView=充气机。充气（R.layout.rowlayout，null，true）；
holder=新的ViewHolder（）；
holder.textView=（textView）rowView.findViewById（R.id.label）；
holder.imageView=（imageView）rowView.findviewbyd（R.id.icon）；
rowView.setTag（支架）；
}否则{
holder=（ViewHolder）rowView.getTag（）；
}
holder.textView.setText（名称[位置]）；
//更改Windows和iPhone的图标
字符串s=名称[位置]；
位图bmp=BitmapFactory.decodeFile（imagePath）；
holder.imageView.setImageBitmap（bmp）；
返回行视图；
}
}

查看有关如何使用视图固定器图案的信息

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希望这有帮助。

这是一个阵列适配器。。。此方法也适用于游标适配器？@StefanReaney您可以读取您的SQLite db以获取配方列表，并像上面那样定义自定义适配器，否则您可以定义自定义游标适配器，这有点不同，您必须覆盖newView和bindView，签出