林新到Android ..
即时通讯与图像的URL面临网格布局问题..
我的代码..
public class act extends Activity {
static String uri1 = "https://i3.ytimg.com/vi/bQaWsVQSLdY/default.jpg";
static String uri2 = "https://i4.ytimg.com/vi/cJQCniWQdno/mqdefault.jpg";
static String uri3 = "https://i1.ytimg.com/vi/D8dA4pE5hEY/mqdefault.jpg";
public static String[] urls = { uri1, uri2, uri3 };
public Bitmap bitmap;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
GridView grd = (GridView) findViewById(R.id.gridView1);
grd.setAdapter(new ImageAdapter(this));
grd.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int pos,
long id) {
Toast.makeText(getBaseContext(), "pic" + (pos + 1) + "select ",
Toast.LENGTH_SHORT).show();
}
});
}
public class ImageAdapter extends BaseAdapter {
private Context context;
private int itemBackground;
ImageAdapter(Context c) {
context = c;
TypedArray a = obtainStyledAttributes(R.styleable.Gallery1);
itemBackground = a.getResourceId(
R.styleable.Gallery1_android_galleryItemBackground, 0);
a.recycle();
}
public int getCount() {
return urls.length;
}
public Object getItem(int pos) {
return pos;
}
public long getItemId(int pos) {
return pos;
}
public View getView(int pos, View cv, ViewGroup vg) {
Bitmap bitmap = DownloadImage(urls[pos]);
ImageView imageview = new ImageView(context);
imageview.setImageBitmap(bitmap);
return cv;
}
private Bitmap DownloadImage(String URL) {
final String URL1 = URL;
new Thread() {
public void run() {
InputStream in = null;
Message msg = Message.obtain();
msg.what = 1;
try {
in = OpenHttpConnection(URL1);
Bitmap bitmap = BitmapFactory.decodeStream(in);
Bundle b = new Bundle();
b.putParcelable("bitmap", bitmap);
msg.setData(b);
in.close();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
}.start();
return bitmap;
}
private InputStream OpenHttpConnection(String urlString)
throws IOException {
InputStream in = null;
int response = -1;
URL url = new URL(urlString);
URLConnection conn = url.openConnection();
if (!(conn instanceof HttpURLConnection))
throw new IOException("Not an HTTP connection");
try {
HttpURLConnection httpConn = (HttpURLConnection) conn;
httpConn.setAllowUserInteraction(false);
httpConn.setInstanceFollowRedirects(true);
httpConn.setRequestMethod("GET");
httpConn.connect();
response = httpConn.getResponseCode();
if (response == HttpURLConnection.HTTP_OK) {
in = httpConn.getInputStream();
}
} catch (Exception ex) {
throw new IOException("Error connecting");
}
return in;
}
}
}
logcat的
E/AndroidRuntime(832): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138) E/AndroidRuntime(832): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1017) E/AndroidRuntime(832): at android.widget.LinearLayout.measureVertical(LinearLayout.java:386) E/AndroidRuntime(832): at android.widget.LinearLayout.onMeasure(LinearLayout.java:309) E/AndroidRuntime(832): at android.view.View.measure(View.java:8313) E/AndroidRuntime(832): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138) E/AndroidRuntime(832): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250) E/AndroidRuntime(832): at android.view.View.measure(View.java:8313) E/AndroidRuntime(832): at android.widget.LinearLayout.measureVertical(LinearLayout.java:531) E/AndroidRuntime(832): at android.widget.LinearLayout.onMeasure(LinearLayout.java:309) E/AndroidRuntime(832): at android.view.View.measure(View.java:8313) E/AndroidRuntime(832): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138) E/AndroidRuntime(832): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250) E/AndroidRuntime(832): at android.view.View.measure(View.java:8313) E/AndroidRuntime(832): at android.view.ViewRoot.performTraversals(ViewRoot.java:839) E/AndroidRuntime(832): at android.view.ViewRoot.handleMessage(ViewRoot.java:1859) E/AndroidRuntime(832): at android.os.Handler.dispatchMessage(Handler.java:99) E/AndroidRuntime(832): at android.os.Looper.loop(Looper.java:123) E/AndroidRuntime(832): at android.app.ActivityThread.main(ActivityThread.java:3683) E/AndroidRuntime(832): at java.lang.reflect.Method.invokeNative(Native Method) E/AndroidRuntime(832): at java.lang.reflect.Method.invoke(Method.java:507) E/AndroidRuntime(832): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) E/AndroidRuntime(832): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) E/AndroidRuntime(832): at dalvik.system.NativeStart.main(Native Method)
