【发布时间】：2016-08-09 08:21:23
【问题描述】：
我在试图解析的 json 中有 标签。我在this question 中使用了接受的答案来显示
图片。但是该应用程序因
java.lang.IllegalStateException 而崩溃。
以下是类和堆栈跟踪：
帖子详情
public class PostDetails extends AppCompatActivity {
private final String TAG = "PostDetails";
TextView postTitle, postAuthorDate, postContent, labelHold, dpostLabel;
View firstView, secView;
CircularNetworkImageView authorImg;
ImageLoader AuthImgLoader;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_post_details);
postTitle = (TextView) findViewById(R.id.dpost_title);
postAuthorDate = (TextView) findViewById(R.id.author_date);
postContent = (TextView) findViewById(R.id.dpost_content);
authorImg = (CircularNetworkImageView) findViewById(R.id.author_img);
labelHold = (TextView) findViewById(R.id.label_hold);
dpostLabel = (TextView) findViewById(R.id.dpost_label);
firstView = findViewById(R.id.dviewtop);
secView = findViewById(R.id.dviewbottom);
ActionBar actionBar = getSupportActionBar();
if (actionBar != null) {
actionBar.setDisplayHomeAsUpEnabled(true);
}
if (savedInstanceState != null) {
postTitle.setText(savedInstanceState.getString("postTitle"));
postAuthorDate.setText(savedInstanceState.getString("posAuthorDate"));
postContent.setText(savedInstanceState.getString("postContent"));
//Unhiding views
postTitle.setVisibility(View.VISIBLE);
postAuthorDate.setVisibility(View.VISIBLE);
postContent.setVisibility(View.VISIBLE);
authorImg.setVisibility(View.VISIBLE);
labelHold.setVisibility(View.VISIBLE);
dpostLabel.setVisibility(View.VISIBLE);
firstView.setVisibility(View.VISIBLE);
secView.setVisibility(View.VISIBLE);
} else {
if (NetworkCheck.isAvailableAndConnected(this)) {
//Calling method to load posts
loadPost();
} else {
final Context context;
context = this;
final AlertDialog.Builder alertDialog = new AlertDialog.Builder(this);
alertDialog.setTitle(R.string.alert_titl);
alertDialog.setCancelable(false);
alertDialog.setIcon(R.mipmap.ic_launcher);
alertDialog.setMessage(R.string.failed_post);
alertDialog.setPositiveButton(R.string.alert_retry, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if (!NetworkCheck.isAvailableAndConnected(context)) {
alertDialog.show();
} else {
loadPost();
}
}
});
alertDialog.setNegativeButton(R.string.alert_cancel, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
finish();
}
});
alertDialog.show();
}
}
}
private void loadPost() {
Log.d(TAG, "loadPost called");
final ProgressBar progressBar;
progressBar = (ProgressBar) findViewById(R.id.progress_circle);
progressBar.setVisibility(View.VISIBLE);
int news_id = getIntent().getIntExtra("PostId", -1);
Log.d(TAG, "You clicked post id " + news_id);
final JsonObjectRequest jsonObjReq = new JsonObjectRequest( DetailConfig.GET_DURL + news_id, null,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.d("Debug", response.toString());
//Unhiding views
postTitle.setVisibility(View.VISIBLE);
postAuthorDate.setVisibility(View.VISIBLE);
postContent.setVisibility(View.VISIBLE);
authorImg.setVisibility(View.VISIBLE);
labelHold.setVisibility(View.VISIBLE);
dpostLabel.setVisibility(View.VISIBLE);
firstView.setVisibility(View.VISIBLE);
secView.setVisibility(View.VISIBLE);
//Dismissing progressbar;
if (progressBar != null) {
progressBar.setVisibility(View.GONE);
}
//Calling method to parse json array
parsePost(response);
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d("", "Error: " + error.getMessage());
}
});
//Creating request queue
RequestQueue requestQueue = Volley.newRequestQueue(this);
//Adding request to queue
requestQueue.add(jsonObjReq);
}
//This method will parse json data of post
private void parsePost(JSONObject jsonObject) {
Log.d(TAG, "Parsing post array");
try {
String title = jsonObject.getString(DetailConfig.TAG_DPOST_TITLE);
postTitle.setText(Html.fromHtml(title));
JSONObject pAuthor = jsonObject.getJSONObject("author");
String author = pAuthor.getString("name");
String authorimg = pAuthor.getString("avatar");
AuthImgLoader = VolleyRequest.getInstance(getApplicationContext()).getImageLoader();
AuthImgLoader.get(authorimg, ImageLoader.getImageListener(authorImg, R.drawable.ic_author, R.drawable.ic_author));
authorImg.setImageUrl(authorimg, AuthImgLoader);
SimpleDateFormat dateFormat = new SimpleDateFormat("dd MMMM, yyyy");
SimpleDateFormat inputFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");
String inputDateStr = jsonObject.getString(DetailConfig.TAG_DPOST_DATE);
try {
Date inputDate = inputFormat.parse(inputDateStr);
String date = dateFormat.format(inputDate);
Resources resources = getResources();
String authdate= String.format(resources.getString(R.string.post_by), author, date);
postAuthorDate.setText(authdate);
} catch (ParseException e) {
Log.d(TAG, "Error in parsing date");
}
String content = jsonObject.getString(DetailConfig.TAG_DPOST_CONTENT);
Spanned spanned = Html.fromHtml(content, new UILImageGetter(postContent, this), null);
postContent.setText(spanned);
} catch (JSONException w) {
w.printStackTrace();
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putString("postTitle", postTitle.getText().toString());
outState.putString("posAuthorDate", postAuthorDate.getText().toString());
outState.putString("postContent", postContent.getText().toString());
//outState.putInt("authorImg", authorimg);
}
@Override
public boolean onSupportNavigateUp() {
onBackPressed();
return true;
}
}
UILImageGetter
public class UILImageGetter implements Html.ImageGetter{
Context c;
TextView conatiner;
UrlImageDownloader urlDrawable;
public UILImageGetter(View textView, Context context) {
this.c = context;
this.conatiner = (TextView) textView;
}
@Override
public Drawable getDrawable(String source) {
urlDrawable = new UrlImageDownloader(c.getResources(), source);
urlDrawable.mDrawable = c.getResources().getDrawable(R.drawable.default_thumb);
ImageLoader.getInstance().loadImage(source, new SimpleListener(urlDrawable));
return urlDrawable;
}
private class SimpleListener extends SimpleImageLoadingListener {
UrlImageDownloader mUrlImageDownloader;
public SimpleListener(UrlImageDownloader downloader) {
super();
mUrlImageDownloader= downloader;
}
@Override
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
int width = loadedImage.getWidth();
int height = loadedImage.getHeight();
int newWidth = width;
int newHeight = height;
if (width > conatiner.getWidth()) {
newWidth = conatiner.getWidth();
newHeight = (newWidth * height) / width;
}
if (view != null) {
view.getLayoutParams().width = newWidth;
view.getLayoutParams().height = newHeight;
}
Drawable result = new BitmapDrawable(c.getResources(), loadedImage);
result.setBounds(0, 0, newWidth, newHeight);
mUrlImageDownloader.setBounds(0, 0, newWidth, newHeight);
mUrlImageDownloader.mDrawable = result;
conatiner.setHeight((conatiner.getHeight() + result.getIntrinsicHeight()));
conatiner.invalidate();
}
}
private class UrlImageDownloader extends BitmapDrawable {
public Drawable mDrawable;
public UrlImageDownloader(Resources resources, String filepath) {
super(resources, filepath);
mDrawable = new BitmapDrawable(resources, filepath);
}
@Override
public void draw(Canvas canvas) {
if (mDrawable != null) {
mDrawable.draw(canvas);
}
}
}
}
堆栈跟踪
04-17 17:53:41.717 4470-4470/com.blogking.poster D/PostDetails: Parsing post array
04-17 17:53:41.747 4470-4470/com.blogking.poster E/BitmapFactory: Unable to decode stream: java.io.FileNotFoundException: https:/ahmadawais.com/wp-content/uploads/2016/04/Ahmad-Awais-Core-Contributor-for-WordPress-4.5-1024x196.jpg: open failed: ENOENT (No such file or directory)
04-17 17:53:41.747 4470-4470/com.blogking.poster W/BitmapDrawable: BitmapDrawable cannot decode https://ahmadawais.com/wp-content/uploads/2016/04/Ahmad-Awais-Core-Contributor-for-WordPress-4.5-1024x196.jpg
04-17 17:53:41.747 4470-4470/com.blogking.poster E/BitmapFactory: Unable to decode stream: java.io.FileNotFoundException: https:/ahmadawais.com/wp-content/uploads/2016/04/Ahmad-Awais-Core-Contributor-for-WordPress-4.5-1024x196.jpg: open failed: ENOENT (No such file or directory)
04-17 17:53:41.747 4470-4470/com.blogking.poster W/BitmapDrawable: BitmapDrawable cannot decode https://ahmadawais.com/wp-content/uploads/2016/04/Ahmad-Awais-Core-Contributor-for-WordPress-4.5-1024x196.jpg
04-17 17:53:41.777 4470-4470/com.blogking.poster D/AndroidRuntime: Shutting down VM
04-17 17:53:41.788 4470-4470/com.blogking.poster E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.blogking.poster, PID: 4470
java.lang.IllegalStateException: ImageLoader must be init with configuration before using
at com.nostra13.universalimageloader.core.ImageLoader.checkConfiguration(ImageLoader.java:613)
at com.nostra13.universalimageloader.core.ImageLoader.loadImage(ImageLoader.java:519)
at com.nostra13.universalimageloader.core.ImageLoader.loadImage(ImageLoader.java:425)
at com.blogking.poster.UILImageGetter.getDrawable(UILImageGetter.java:34)
at android.text.HtmlToSpannedConverter.startImg(Html.java:634)
at android.text.HtmlToSpannedConverter.handleStartTag(Html.java:520)
at android.text.HtmlToSpannedConverter.startElement(Html.java:761)
at org.ccil.cowan.tagsoup.Parser.push(Parser.java:794)
at org.ccil.cowan.tagsoup.Parser.rectify(Parser.java:1061)
at org.ccil.cowan.tagsoup.Parser.stage(Parser.java:1026)
at org.ccil.cowan.tagsoup.HTMLScanner.scan(HTMLScanner.java:632)
at org.ccil.cowan.tagsoup.Parser.parse(Parser.java:449)
at android.text.HtmlToSpannedConverter.convert(Html.java:442)
at android.text.Html.fromHtml(Html.java:136)
at com.blogking.poster.PostDetails.parsePost(PostDetails.java:198)
at com.blogking.poster.PostDetails.access$100(PostDetails.java:34)
at com.blogking.poster.PostDetails$3.onResponse(PostDetails.java:148)
at com.blogking.poster.PostDetails$3.onResponse(PostDetails.java:127)
at com.android.volley.toolbox.JsonRequest.deliverResponse(JsonRequest.java:65)
at com.android.volley.ExecutorDelivery$ResponseDeliveryRunnable.run(ExecutorDelivery.java:99)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5910)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1405)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1200)
从堆栈跟踪中，第 198 行是 Spanned spanned = Html.fromHtml(content, new UILImageGetter(postContent, this), null);，
第 34 行是public class PostDetails extends AppCompatActivity {，
第 148 行是parsePost(response);，
第 127 行是new Response.Listener<JSONObject>() {
有什么解决办法吗？
注意：UILImageGetter 正在使用Android-Universal-Image-Loader 库。
【问题讨论】：