Question

在我的代码中图像未在SDView中从sdcard打开我已经检查了＆＃39; manifest.xml＆＃39;中的权限。如果我尝试使用静态名称打开它，那么它将由ImageView显示，但不会动态显示。

主要活动

private OnClickListener OnCapture =  new OnClickListener() {        
    @Override
    public void onClick(View v) {
        String time = mCamUtils.clickPicture();
        nextActivity = new Intent(MainActivity.this,EffectActivity.class);
        nextActivity.putExtra("ImageName", time);
        startActivity(nextActivity);
        finish();
    }
};

EffectActivity

    public class EffectActivity extends Activity {

Intent getActivity = null;
ImageView image = null;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.effectactivity);

    getActivity = getIntent();
    String name = getActivity.getStringExtra("ImageName");

    String path = Environment.getExternalStorageDirectory()+"/GalaxyPhoto/GX_" +name+ ".JPG";

    Toast.makeText(getApplicationContext(), path, Toast.LENGTH_LONG).show();
    image = (ImageView) findViewById(R.id.imageView1);
    File f = new File(path);
    byte[] b = new byte[(int)f.length()];
    if(f.exists())
    {
        try
        {
            if(f.exists())
            {
                FileInputStream ff = new FileInputStream(f);
                ff.read(b);
                Bitmap g = BitmapFactory.decodeFile(path);
                image.setImageBitmap(g);
                ff.close();
            }
            else
            {
                Toast.makeText(getApplicationContext(), "ELSE", Toast.LENGTH_LONG).show();
            }
        }
        catch(Exception e)
        {

        }
    }
}

}

我正在尝试打开我在此活动之前保存的图像，我在此处捕获图像的名称，但不显示图像。

Answer 1

 String fname = "Pic-" + System.currentTimeMillis() + ".png";
 File image= new File(imagesFolder, fname);
Bitmap bitmap;

            BitmapFactory.Options bitmapOptions = new BitmapFactory.Options();

            picturePath=image.getAbsolutePath();

            bitmap = BitmapFactory.decodeFile(image.getAbsolutePath(), bitmapOptions);

            imageView.setImageBitmap(bitmap);

试试这段代码

Answer 2

String path = Environment.getExternalStorageDirectory()+"/GalaxyPhoto/GX_" +name+ ".JPG";

在此行中尝试将“JPG”更改为“jpg”。我认为您的文件扩展名可能是小写字母，并且可能会说f.exists为false。希望它会有所帮助。

Image不会在ImageView中动态显示图像

2 个答案: