Android 如何通过意图传递图像？
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how to pass images through intent?
提问by Pankaj Arora
First class
头等舱
public class ChooseDriver extends Activity implements OnItemClickListener {
private static final String rssFeed = "http://trade2rise.com/project/seattle/windex.php?itfpage=driver_list";
private static final String ARRAY_NAME = "itfdata";
private static final String ID = "id";
private static final String NAME = "name";
private static final String IMAGE = "image";
List<Item> arrayOfList;
ListView listView;
MyAdapter objAdapter1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.choose_driver);
listView = (ListView) findViewById(R.id.listView1);
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
Item item = (Item) objAdapter1.getItem(position);
Intent intent = new Intent(ChooseDriver.this, DriverDetail.class);
intent.putExtra(ID, item.getId());
intent.putExtra(NAME, item.getName().toString());
// intent.putExtra(IMAGE, item.getImage().toString());
// image.buildDrawingCache();
// Bitmap image= image.getDrawingCache();
Bundle extras = new Bundle();
// extras.putParcelable("imagebitmap", image);
intent.putExtras(extras);
startActivity(intent);
}
});
}
}
Second class
二等舱
public class DriverDetail extends Activity {
private ImageLoader imageLoader;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.driver_detail);
ImageView imageView = (ImageView) findViewById(R.id.imageView1);
TextView tv = (TextView) findViewById(R.id.tvDname);
Bundle extras = getIntent().getExtras();
Bitmap bmp = (Bitmap) extras.getParcelable("imagebitmap");
imageView.setImageBitmap(bmp );
//imageView.set(getIntent().getExtras().getString("image"));
tv.setText(getIntent().getExtras().getString("name"));
}
}
By using it I can show text very well, but I can't show an image on second Aactivity.
通过使用它，我可以很好地显示文本，但我无法在第二个 Aactivity 上显示图像。
回答by Pankaj Arora
You can pass it as a byte array and build the bitmap for display on the next screen. but using intent we can send small images like thumbnails,icons etc.else it will gives bind failure.
您可以将其作为字节数组传递并构建位图以在下一个屏幕上显示。但是使用意图我们可以发送小图像，如缩略图、图标等。否则它会导致绑定失败。
Sender Activity
发件人活动
Intent _intent = new Intent(this, newscreen.class);
Bitmap _bitmap; // your bitmap
ByteArrayOutputStream _bs = new ByteArrayOutputStream();
_bitmap.compress(Bitmap.CompressFormat.PNG, 50, _bs);
_intent.putExtra("byteArray", _bs.toByteArray());
startActivity(_intent);
Receiver Activity
接收器活动
if(getIntent().hasExtra("byteArray")) {
ImageView _imv= new ImageView(this);
Bitmap _bitmap = BitmapFactory.decodeByteArray(
getIntent().getByteArrayExtra("byteArray"),0,getIntent().getByteArrayExtra("byteArray").length);
_imv.setImageBitmap(_bitmap);
}
