java.lang.IllegalArgumentException:宽度和高度必须>在Android中为0 [英] java.lang.IllegalArgumentException: width and height must be > 0 in android
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问题描述
我正在尝试从用户的MultiAutoCompleteTextView中获取文本，并以类似气泡的格式显示它们，但是我正在获取
:宽度和高度在Android中必须> 0
I am trying to get the text from the MultiAutoCompleteTextView from the user and show them in the bubble like format but I am getting
: width and height must be > 0 in android
final MultiAutoCompleteTextView tags = (MultiAutoCompleteTextView) findViewById(R.id.multiAutoCompleteTextView1);
String[] TAGS = getResources().getStringArray(R.array.countries);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, TAGS);
tags.setAdapter(adapter);
tags.setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer());
tags.setThreshold(1);
String contactName = tags.getText().toString();
final SpannableStringBuilder sb = new SpannableStringBuilder();
TextView tv = createContactTextView(contactName);
BitmapDrawable bd = (BitmapDrawable) convertViewToDrawable(tv);
bd.setBounds(0, 0, bd.getIntrinsicWidth(), bd.getIntrinsicHeight());
sb.append(contactName + ",");
sb.setSpan(new ImageSpan(bd), sb.length() - (contactName.length() + 1), sb.length() - 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
Toast.makeText(getApplicationContext(),sb,Toast.LENGTH_SHORT).show();
}
public TextView createContactTextView(String text){
//creating textview dynamically
TextView tv = new TextView(this);
tv.setText(text);
tv.setTextSize(20);
tv.setBackgroundResource(R.drawable.oval);
tv.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.ic_clear_search_api_holo_light, 0);
return tv;
}
public static Object convertViewToDrawable(View view) {
int spec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
view.measure(spec, spec);
view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
Bitmap b = Bitmap.createBitmap(view.getMeasuredWidth(), view.getMeasuredHeight(), Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
c.translate(-view.getScrollX(), -view.getScrollY());
view.draw(c);
view.setDrawingCacheEnabled(true);
Bitmap cacheBmp = view.getDrawingCache();
Bitmap viewBmp = cacheBmp.copy(Bitmap.Config.ARGB_8888, true);
view.destroyDrawingCache();
return new BitmapDrawable(viewBmp);
}
当我尝试运行此错误时，出现此错误 宽度和高度必须大于0.
when i try t run this i get this error width and height must be greater than 0.
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.androidbegin.train, PID: 11263
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.androidbegin.train/com.androidbegin.loginregister.WorkNow}: java.lang.IllegalArgumentException: width and height must be > 0
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2339)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2413)
at android.app.ActivityThread.access$800(ActivityThread.java:155)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1317)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5343)
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:905)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700)
Caused by: java.lang.IllegalArgumentException: width and height must be > 0
at android.graphics.Bitmap.createBitmap(Bitmap.java:836)
at android.graphics.Bitmap.createBitmap(Bitmap.java:815)
at android.graphics.Bitmap.createBitmap(Bitmap.java:782)
at com.androidbegin.loginregister.WorkNow.convertViewToDrawable(WorkNow.java:57)
at com.androidbegin.loginregister.WorkNow.onCreate(WorkNow.java:34)
at android.app.Activity.performCreate(Activity.java:6010)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1129)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2292)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2413)
at android.app.ActivityThread.access$800(ActivityThread.java:155)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1317)
at android.os.Handler.dispatchMessage(Handler.java:102)
推荐答案
我认为主要问题是spec被设置为0
I think the main problem is that specis being set to 0
int spec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
然后，在这里，视图的宽度和高度将为0 ...
Then, here, view will have 0 as width and height...
view.measure(spec, spec);
view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
因此，在创建位图时，会出现Exception的原因，因为view.getMeasuredWidth()和view.getMeasuredHeight()都为0，而不能为
So, when creating the Bitmap, an Exception will happen because view.getMeasuredWidth() and view.getMeasuredHeight() are both 0 and they can't be
Bitmap b = Bitmap.createBitmap(view.getMeasuredWidth(), view.getMeasuredHeight(), Bitmap.Config.ARGB_8888);
如果可能，请尝试更改为以下内容:
If possible, try to change to something like:
int spec = View.MeasureSpec.makeMeasureSpec(ViewGroup.LayoutParams.WRAP_CONTENT, View.MeasureSpec.UNSPECIFIED);
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