问题
Currently I am using code to give text suggestion. I would like to add another text and image. How do I do that? Currently, I am using the code below.I shows text but image is not displayed .How do I set the image ?
public class AutoCompleteTextViewActivity extends Activity{
ImageLoader imageLoader;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
DisplayImageOptions defaultOptions = new DisplayImageOptions.Builder()
.cacheInMemory(true)
.cacheOnDisc(true)
.build();
ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(getApplicationContext())
.defaultDisplayImageOptions(defaultOptions)
.build();
ImageLoader.getInstance().init(config);
AutoCompleteTextView actv = new AutoCompleteTextView(this);
actv.setThreshold(1);
final String[] from = {BaseColumns._ID, "name", "artist", "title"};
int[] to = {R.id.list_image, R.id.textView1, R.id.textView2, R.id.textView3};
final SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, R.layout.list_row, null, from, to);
adapter.setStringConversionColumn(1);
ViewBinder viewBinder = new ViewBinder() {
public boolean setViewValue(View view, Cursor cursor, int columnIndex) {
if (columnIndex == 0) {
ImageView iv = (ImageView) view;
Bitmap bitmap = cursor.getExtras().getParcelable("image");
if (bitmap != null) {
iv.setImageBitmap(bitmap);
}
return true;
}
return false;
}
};
adapter.setViewBinder(viewBinder);
FilterQueryProvider provider = new FilterQueryProvider() {
ExecutorService mPool = Executors.newCachedThreadPool();
Uri URI = Uri.parse("adapter://autocomplete");
public Cursor runQuery(CharSequence constraint) {
if (constraint == null) {
return null;
}
try {
return callWebService(constraint, from);
} catch (JSONException e) {
e.printStackTrace();
return null;
}
}
// here you make the web request
private Cursor callWebService(CharSequence constraint, String[] columnNames) throws JSONException {
Log.d("TAG", "callWebService for: " + constraint);
MatrixCursor cursor = new MyMatrixCursor(columnNames);
// TODO do real network request
// call web service here and keep the result in "jsonStr"
// String a=constraint;
JSONObject json=JSONfunctions.getJSONfromURL("http://ws.audioscrobbler.com/2.0/?method=artist.getinfo&artist="+ constraint +"&api_key=63692beaaf8ba794a541bca291234cd3&format=json");
JSONObject js1=json.getJSONObject("artist");
JSONObject js=js1.getJSONObject("similar");
JSONArray resultArray = js.getJSONArray("artist");
int length = resultArray.length();
for (int i = 0; i < length; i++) {
String data = resultArray.getJSONObject(i).getString("name");
String dataimage = resultArray.getJSONObject(i).getJSONArray("image").getJSONObject(i).getString("#text");
cursor.newRow().add(i)
.add(data)
.add(data)
.add(data);
String link = dataimage;
// get cached Bundle based on "link" (use HashMap<String, Bundle>)
// or if new link initiate async request for getting the bitmap
// TODO implement HashMap caching
// new async request
Bundle extras = new Bundle();
try {
mPool.submit(new ImageRequest(link, extras));
} catch (MalformedURLException e) {
e.printStackTrace();
}
cursor.respond(extras);
}
cursor.setNotificationUri(getContentResolver(), URI);
return cursor;
}
class ImageRequest implements Runnable {
private URL mUrl;
private Bundle mExtra;
public ImageRequest(String link, Bundle extra) throws MalformedURLException {
mUrl = new URL(link);
mExtra = extra;
}
public void run() {
String TAG="log";
// TODO do real network request
// simulate network delay
// Log.d(TAG, "getting " + mUrl);
// try {
// Thread.sleep(2000 + (long) (4000 * Math.random()));
// } catch (InterruptedException e) {
// e.printStackTrace();
// }
Bitmap b = imageLoader.loadImageSync(mUrl.toString());
// Bitmap b = BitmapFactory.decodeResource(getResources(), mUrl.toString());
mExtra.putParcelable("image", b);
getContentResolver().notifyChange(URI, null);
Log.d(TAG, "run got a bitmap " + b.getWidth() + "x" + b.getHeight());
}
}
};
adapter.setFilterQueryProvider(provider);
actv.setAdapter(adapter);
LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
setContentView(actv, params);
}
}
///////////////
MyMatrixCursor //////////
public class MyMatrixCursor extends MatrixCursor {
List<Bundle> mBundles = new ArrayList<Bundle>();
public MyMatrixCursor(String[] columnNames) {
super(columnNames);
}
@Override
public Bundle respond(Bundle extras) {
mBundles.add(extras);
return extras;
}
@Override
public Bundle getExtras() {
return mBundles.get(mPos);
}
}
////////
JSONfunctions ///////
public class JSONfunctions {
public static JSONObject getJSONfromURL(String url){
InputStream is = null;
String result = "";
JSONObject jArray = null;
//http post
try{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(url);
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
}catch(Exception e){
Log.e("log_tag", "Error in http connection "+e.toString());
}
//convert response to string
try{
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
result=sb.toString();
}catch(Exception e){
Log.w("log_tag", "Error converting result "+e.toString());
}
try{
jArray = new JSONObject(result);
}catch(JSONException e){
Log.w("log_tag", "Error parsing data "+e.toString());
}
return jArray;
}
}
////////
main.xml ///
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Pick Artist"
android:textAppearance="?android:attr/textAppearanceLarge" />
<AutoCompleteTextView
android:id="@+id/actv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:completionThreshold="1"> <requestFocus />
</AutoCompleteTextView>
<TextView
android:id="@+id/selection"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
/////
list_row.xml ///
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@android:color/white"
android:orientation="horizontal"
android:padding="5dip" >
<!-- ListRow Left sied Thumbnail image -->
<LinearLayout android:id="@+id/thumbnail"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="3dip"
android:layout_alignParentLeft="true"
android:layout_marginRight="5dip">
<ImageView
android:id="@+id/list_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:maxWidth="42dp"
android:maxHeight="42dp"
android:src="@drawable/ic_launcher"
android:scaleType="fitCenter"
android:layout_marginLeft="3dp"/>
</LinearLayout>
<!-- Title Of Song-->
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="@+id/thumbnail"
android:layout_toRightOf="@+id/thumbnail"
android:text="test"
android:textColor="#040404"
android:typeface="sans"
android:textSize="15dip"
android:textStyle="bold"/>
<!-- Artist Name -->
<!-- Rightend Duration -->
<!-- Rightend Arrow -->
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView1"
android:layout_centerVertical="true"
android:text="test"
android:textColor="#040404"
android:textSize="5dip"
android:textStyle="bold"
android:typeface="sans" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/thumbnail"
android:layout_toRightOf="@+id/thumbnail"
android:text="test"
android:textColor="#040404"
android:textSize="15dip"
android:textStyle="bold"
android:typeface="sans" />
</RelativeLayout>
/// Manifest
///
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.example"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:label="@string/app_name"
android:name=".AutoCompleteTextViewActivity" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
回答1:
ok try this:
LinearLayout ll = new LinearLayout(this);
ll.setOrientation(LinearLayout.VERTICAL);
AutoCompleteTextView actv = new AutoCompleteTextView(this);
actv.setThreshold(1);
String[] from = {"name"};
int[] to = {android.R.id.text1};
SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, android.R.layout.simple_dropdown_item_1line, null, from, to) {
// required for Spanned data
@Override
public void bindView(View view, Context context, Cursor cursor) {
MyCursor c = (MyCursor) cursor;
TextView tv = (TextView) view;
tv.setText(c.getSpanned());
}
// required for Spanned data
@Override
public CharSequence convertToString(Cursor cursor) {
MyCursor c = (MyCursor) cursor;
return c.getSpanned();
}
};
FilterQueryProvider provider = new FilterQueryProvider() {
@Override
public Cursor runQuery(CharSequence constraint) {
if (constraint == null) {
return null;
}
MyCursor c = new MyCursor();
// fake web service responses
List<String> names = callFakeWebService(constraint);
int i = 0;
for (String name: names) {
SpannableStringBuilder ssb = new SpannableStringBuilder(name);
int start = name.indexOf(" ");
ForegroundColorSpan what = new ForegroundColorSpan(0xffff0000);
ssb.setSpan(what, start + 1, ssb.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
c.newRow().add(i++).add(name);
c.addSpanned(ssb);
}
return c;
}
// fake web service request
private List<String> callFakeWebService(CharSequence constraint) {
Log.d(TAG, "callFakeWebService for: " + constraint);
String[] namesArr = {
"Mark Smith",
"Monica Thompson",
"John White",
"Jane Brown"
};
String stringConstraint = constraint.toString().toLowerCase();
List<String> names = new ArrayList<String>();
for (int i = 0; i < namesArr.length; i++) {
String name = namesArr[i];
if (name.toLowerCase().startsWith(stringConstraint)) {
names.add(name);
}
}
return names;
}
};
adapter.setFilterQueryProvider(provider);
actv.setAdapter(adapter);
ll.addView(actv);
TextView tv = new TextView(this);
tv.setTextSize(32);
tv.setTextColor(0xffff0000);
tv.setText("type one of:\n mark,\n monica,\n john\n jane");
ll.addView(tv);
setContentView(ll);
where custom Cursor could look like this (it is minimalistic version supporting only one Spanned in a row):
static class MyCursor extends MatrixCursor {
private static final String[] NAMES = {BaseColumns._ID, "name"};
private ArrayList<Spanned> mSpannedList;
public MyCursor() {
super(NAMES);
mSpannedList = new ArrayList<Spanned>();
}
public void addSpanned(Spanned s) {
mSpannedList.add(s);
}
public Spanned getSpanned() {
return mSpannedList.get(mPos);
}
}
EDIT with no Spanned text:
AutoCompleteTextView actv = new AutoCompleteTextView(this);
actv.setThreshold(1);
final String[] from = {BaseColumns._ID, "name", "artist", "title"};
int[] to = {R.id.list_image, R.id.textView1, R.id.textView2, R.id.textView3};
final SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, R.layout.list_row, null, from, to);
adapter.setStringConversionColumn(1);
ViewBinder viewBinder = new ViewBinder() {
public boolean setViewValue(View view, Cursor cursor, int columnIndex) {
if (columnIndex == 0) {
ImageView iv = (ImageView) view;
Bitmap bitmap = cursor.getExtras().getParcelable("image");
if (bitmap != null) {
iv.setImageBitmap(bitmap);
}
return true;
}
return false;
}
};
adapter.setViewBinder(viewBinder);
FilterQueryProvider provider = new FilterQueryProvider() {
ExecutorService mPool = Executors.newCachedThreadPool();
Uri URI = Uri.parse("adapter://autocomplete");
public Cursor runQuery(CharSequence constraint) {
if (constraint == null) {
return null;
}
try {
return callWebService(constraint, from);
} catch (JSONException e) {
e.printStackTrace();
return null;
}
}
// here you make the web request
private Cursor callWebService(CharSequence constraint, String[] columnNames) throws JSONException {
Log.d("TAG", "callWebService for: " + constraint);
MatrixCursor cursor = new MyMatrixCursor(columnNames);
// TODO do real network request
// call web service here and keep the result in "jsonStr"
String jsonStr = "{\"ResultArray\":[{\"data\":{ \"sno\":\"sno1\", \"date\":\"2011-08-21 14:27:09\", \"user\":\"1\", \"link\":\"http://scm-l3.technorati.com/11/11/17/56749/google-docs-revision.jpg?t=20111117074048\", \"name\":\"Aa\" }},{\"data\":{ \"sno\":\"sno2\", \"date\":\"2011-08-21 14:28:09\", \"user\":\"2\", \"link\":\"http://kcclaveria.com/wp-content/uploads/2013/02/google-panda-penguin.jpg\", \"name\":\"Bb\" }}]}";
JSONObject json = new JSONObject(jsonStr);
JSONArray resultArray = json.getJSONArray("ResultArray");
int length = resultArray.length();
for (int i = 0; i < length; i++) {
JSONObject data = resultArray.getJSONObject(i).getJSONObject("data");
cursor.newRow().add(i)
.add(data.getString("name"))
.add(data.getString("user"))
.add(data.getString("sno"));
String link = data.getString("link");
// get cached Bundle based on "link" (use HashMap<String, Bundle>)
// or if new link initiate async request for getting the bitmap
// TODO implement HashMap caching
// new async request
Bundle extras = new Bundle();
try {
mPool.submit(new ImageRequest(link, extras));
} catch (MalformedURLException e) {
e.printStackTrace();
}
cursor.respond(extras);
}
cursor.setNotificationUri(getContentResolver(), URI);
return cursor;
}
class ImageRequest implements Runnable {
private URL mUrl;
private Bundle mExtra;
public ImageRequest(String link, Bundle extra) throws MalformedURLException {
mUrl = new URL(link);
mExtra = extra;
}
@Override
public void run() {
// TODO do real network request
// simulate network delay
Log.d(TAG, "getting " + mUrl);
try {
Thread.sleep(2000 + (long) (4000 * Math.random()));
} catch (InterruptedException e) {
e.printStackTrace();
}
Bitmap b = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
mExtra.putParcelable("image", b);
getContentResolver().notifyChange(URI, null);
Log.d(TAG, "run got a bitmap " + b.getWidth() + "x" + b.getHeight());
}
}
};
adapter.setFilterQueryProvider(provider);
actv.setAdapter(adapter);
LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
setContentView(actv, params);
and the custom MatrixCursor:
class MyMatrixCursor extends MatrixCursor {
List<Bundle> mBundles = new ArrayList<Bundle>();
public MyMatrixCursor(String[] columnNames) {
super(columnNames);
}
@Override
public Bundle respond(Bundle extras) {
mBundles.add(extras);
return extras;
}
@Override
public Bundle getExtras() {
return mBundles.get(mPos);
}
}
来源：https://stackoverflow.com/questions/21450774/how-to-dynamically-add-suggestions-to-autocompletetextview-with-preserving-chara