嘿伙计，所以我从instagram解析了一个json数组，在网格视图中显示用户图库我想知道如何实现一个onclicklistener，单击时将每个图像全屏转换，然后再次单击时返回gridview谢谢你
主要活动
public class MainActivity extends Activity {
private InstagramSession mInstagramSession;
private Instagram mInstagram;
private ProgressBar mLoadingPb;
private GridView mGridView;
private static final String CLIENT_ID = "83549f9eb76f4a5b90daf6e4e14da107";
private static final String CLIENT_SECRET = "6df26b0c8f664323a07126bfe8511651";
private static final String REDIRECT_URI = "http://www.yahoo.com";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mInstagram = new Instagram(this, CLIENT_ID, CLIENT_SECRET, REDIRECT_URI);
mInstagramSession = mInstagram.getSession();
if (mInstagramSession.isActive()) {
setContentView(R.layout.activity_user);
InstagramUser instagramUser = mInstagramSession.getUser();
mLoadingPb = (ProgressBar) findViewById(R.id.pb_loading);
mGridView = (GridView) findViewById(R.id.gridView);
((TextView) findViewById(R.id.tv_name)).setText(instagramUser.fullName);
((TextView) findViewById(R.id.tv_username)).setText(instagramUser.username);
((Button) findViewById(R.id.btn_logout)).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
mInstagramSession.reset();
startActivity(new Intent(MainActivity.this, MainActivity.class));
finish();
}
});
ImageView userIv = (ImageView) findViewById(R.id.iv_user);
DisplayImageOptions displayOptions = new DisplayImageOptions.Builder()
.showImageOnLoading(R.drawable.ic_user)
.showImageForEmptyUri(R.drawable.ic_user)
.showImageOnFail(R.drawable.ic_user)
.cacheInMemory(true)
.cacheOnDisc(false)
.considerExifParams(true)
.build();
ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(this)
.writeDebugLogs()
.defaultDisplayImageOptions(displayOptions)
.build();
ImageLoader imageLoader = ImageLoader.getInstance();
imageLoader.init(config);
AnimateFirstDisplayListener animate = new AnimateFirstDisplayListener();
imageLoader.displayImage(instagramUser.profilPicture, userIv, animate);
new DownloadTask().execute();
} else {
setContentView(R.layout.activity_main);
((Button) findViewById(R.id.btn_connect)).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
mInstagram.authorize(mAuthListener);
}
});
}
}
private void showToast(String text) {
Toast.makeText(getApplicationContext(), text, Toast.LENGTH_LONG).show();
}
private Instagram.InstagramAuthListener mAuthListener = new Instagram.InstagramAuthListener() {
@Override
public void onSuccess(InstagramUser user) {
finish();
startActivity(new Intent(MainActivity.this, MainActivity.class));
}
@Override
public void onError(String error) {
showToast(error);
}
@Override
public void onCancel() {
showToast("OK. Maybe later?");
}
};
public static class AnimateFirstDisplayListener extends SimpleImageLoadingListener {
static final List<String> displayedImages = Collections.synchronizedList(new LinkedList<String>());
@Override
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
if (loadedImage != null) {
ImageView imageView = (ImageView) view;
boolean firstDisplay = !displayedImages.contains(imageUri);
if (firstDisplay) {
FadeInBitmapDisplayer.animate(imageView, 500);
displayedImages.add(imageUri);
}
}
}
}
public class DownloadTask extends AsyncTask<URL, Integer, Long> {
ArrayList<String> photoList;
protected void onCancelled() {
}
protected void onPreExecute() {
}
protected Long doInBackground(URL... urls) {
long result = 0;
try {
List<NameValuePair> params = new ArrayList<NameValuePair>(1);
params.add(new BasicNameValuePair("count", "20"));
InstagramRequest request = new InstagramRequest(mInstagramSession.getAccessToken());
String response = request.createRequest("GET", "/users/21846697/media/recent", params);
if (!response.equals("")) {
JSONObject jsonObj = (JSONObject) new JSONTokener(response).nextValue();
JSONArray jsonData = jsonObj.getJSONArray("data");
int length = jsonData.length();
if (length > 0) {
photoList = new ArrayList<String>();
for (int i = 0; i < length; i++) {
JSONObject jsonPhoto = jsonData.getJSONObject(i).getJSONObject("images").getJSONObject("low_resolution");
photoList.add(jsonPhoto.getString("url"));
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
protected void onProgressUpdate(Integer... progress) {
}
protected void onPostExecute(Long result) {
mLoadingPb.setVisibility(View.GONE);
if (photoList == null) {
Toast.makeText(getApplicationContext(), "No Photos Available", Toast.LENGTH_LONG).show();
} else {
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
int width = (int) Math.ceil((double) dm.widthPixels / 2);
width=width-50;
int height = width;
PhotoListAdapter adapter = new PhotoListAdapter(MainActivity.this);
adapter.setData(photoList);
adapter.setLayoutParam(width, height);
gridView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
//code goes here to get the image url based on the position
Intent myintent=new Intent(currentActivity.this, FullscreenImageView.class).putExtra("SelectedImageURL", value);
startActivity(myintent);
}
});
mGridView.setAdapter(adapter);
}
}
}
}
PhotoListAdapter
public class PhotoListAdapter extends BaseAdapter {
private Context mContext;
private ImageLoader mImageLoader;
private AnimateFirstDisplayListener mAnimator;
private ArrayList<String> mPhotoList;
private int mWidth;
private int mHeight;
public PhotoListAdapter(Context context) {
mContext = context;
DisplayImageOptions displayOptions = new DisplayImageOptions.Builder()
.showImageOnLoading(R.drawable.instagram_logo)
.showImageForEmptyUri(R.drawable.instagram_logo)
.showImageOnFail(R.drawable.instagram_logo)
.cacheInMemory(true)
.cacheOnDisc(false)
.considerExifParams(true)
.build();
ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(context)
.writeDebugLogs()
.defaultDisplayImageOptions(displayOptions)
.build();
mImageLoader = ImageLoader.getInstance();
mImageLoader.init(config);
mAnimator = new AnimateFirstDisplayListener();
}
public void setData(ArrayList<String> data) {
mPhotoList = data;
}
public void setLayoutParam(int width, int height) {
mWidth = width;
mHeight = height;
}
@Override
public int getCount() {
return (mPhotoList == null) ? 0 : mPhotoList.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageIv;
if (convertView == null) {
imageIv = new ImageView(mContext);
imageIv.setLayoutParams(new GridView.LayoutParams(mWidth, mHeight));
imageIv.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
imageIv.setPadding(0, 0, 0, 0);
} else {
imageIv = (ImageView) convertView;
}
mImageLoader.displayImage(mPhotoList.get(position), imageIv, mAnimator);
return imageIv;
}
}
FullscreenImageView
package net.londatiga.android.example;
public class FullscreenImageView {
String imageURL = getIntent().getStringExtra("SelectedImageURL");
}
Activity_user.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="@dimen/activity_vertical_margin"
android:background="#000000">
<ImageView
android:id="@+id/iv_user"
android:layout_width="0dp"
android:layout_height="0dp"
android:contentDescription="@string/app_name"
android:src="@drawable/ic_user" />
<LinearLayout
android:layout_toRightOf="@+id/iv_user"
android:layout_alignTop="@+id/iv_user"
android:layout_alignBottom="@+id/iv_user"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="@dimen/activity_vertical_margin"
android:orientation="vertical"
android:gravity="center_vertical">
<TextView
android:id="@+id/tv_name"
android:layout_width="0dp"
android:layout_height="0dp"
android:textColor="#fff"
android:textStyle="bold"
android:textSize="17sp"
android:text="Name"/>
<TextView
android:id="@+id/tv_username"
android:layout_width="0dp"
android:layout_height="0dp"
android:textColor="#fff"
android:text="Username"/>
</LinearLayout>
<Button
android:id="@+id/btn_logout"
android:layout_below="@+id/iv_user"
android:layout_width="0dp"
android:layout_height="0dp"
android:textSize="5pt"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:textColor="#ff0000"
android:background="#000000"
android:text="@string/text_signout" />
<RelativeLayout
android:layout_below="@+id/btn_logout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<GridView
android:id="@+id/gridView"
android:verticalSpacing="5dp"
android:horizontalSpacing="5dp"
android:padding="5dp"
android:stretchMode="columnWidth"
android:numColumns="2"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<ProgressBar
style="?android:attr/progressBarStyleLarge"
android:id="@+id/pb_loading"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_centerInParent="true"/>
</RelativeLayout>
activity_fullscreen
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".ActivityHome" >
<ImageView
android:id="@+id/imgView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginLeft="0dp"
android:layout_marginTop="0dp"
android:scaleType="fitXY"
/>
答案 0 :(得分：2)
创建新布局：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".ActivityHome" >
<ImageView
android:id="@+id/imgView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginLeft="0dp"
android:layout_marginTop="0dp"
android:scaleType="fitXY" //the image will be stretched to fit all the sides of the ImageView
android:scaleType="centerInside" //if you want to keep the resolution use
/>
</RelativeLayout>
通过点击通话
调用此活动Intent myintent=new Intent(currentActivity.this, FullscreenImageView.class).putExtra("SelectedImageURL", value);
startActivity(myintent);
FullscreenImageView课程中的：
String imageURL = getIntent().getStringExtra("SelectedImageURL");
在您将方法添加到网格视图的方法中：
gridView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
//code goes here to get the image url based on the position
}
});