Question

我使用ImageSpan在textview中显示图像。 TextView是带有结尾椭圆形的sinlgline。当图像处于textview的末尾并且没有足够的空间时。我认为它应该显示＆＃34; ...＆＃34;。但它显示了Image的一部分。图像被错误地剪裁。

enter image description here

xml：

<LinearLayout 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:paddingLeft="@dimen/activity_horizontal_margin"
            android:paddingRight="@dimen/activity_horizontal_margin"
            android:paddingTop="@dimen/activity_vertical_margin"
            android:paddingBottom="@dimen/activity_vertical_margin"
            tools:context=".MainActivity"
android:orientation="vertical">


    <EditText
    android:id="@+id/edittext"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"/>

    <Button
    android:id="@+id/btn"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="insert image"/>

    <TextView
    android:id="@+id/text"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:singleLine="true"
    android:ellipsize="end"/>
</LinearLayout>

代码：

public class MainActivity extends Activity {

private EditText editText;
private Button button;
private TextView textView;

private static final String PATTERN = "\\[\\w+?\\]";
private Pattern pattern;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    editText = (EditText) findViewById(R.id.edittext);
    button = (Button) findViewById(R.id.btn);
    textView = (TextView) findViewById(R.id.text);

    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            insertImageSpan();
        }
    });

    pattern = Pattern.compile(PATTERN);



    editText.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {

        }

        @Override
        public void afterTextChanged(Editable s) {
            textView.setText(s);
        }
    });
}

private void insertImageSpan(){
    insertTextInCurrentPosition(editText,"[face]");
    int select = editText.getSelectionStart();
    editText.setText(spanText(editText.getText()));
    editText.setSelection(select);
}

public CharSequence spanText(CharSequence text) {
    SpannableStringBuilder t = null;
    if(text instanceof SpannableStringBuilder){
        t = (SpannableStringBuilder) text;
    }else{
        t = new SpannableStringBuilder(text);
    }
    Matcher m = pattern.matcher(text);
    while (m.find()) {
        String mResult = m.group();
        String key = mResult.substring(1, mResult.length() - 1);

        ImageSpan[] spans = t.getSpans(m.start(),m.end(),ImageSpan.class);
        if(spans== null || spans.length==0 ){
            try{
                ImageSpan span = new ImageSpan(this , R.drawable.ic_launcher);
                t.setSpan(span , m.start() , m.end() , Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
            }catch (Exception e){
                continue;
            }
        }

    }
    return t;
}

public static void insertTextInCurrentPosition(EditText tv, CharSequence str) {
    if (tv == null || TextUtils.isEmpty(str)) return;
    tv.getText().replace(tv.getSelectionStart() , tv.getSelectionEnd() , str , 0 , str.length());
}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}


}

Answer 1

在将文本设置为TextView之前，我使用 TextUtils.ellipsize 作为文本。

CharSequence cs = TextUtils.ellipsize(s, textView.getPaint(), textView.getWidth() - textView.getPaddingRight() - textView.getPaddingLeft(), TextUtils.TruncateAt.END);
textView.setText(cs);

Answer 2

如果textview设置了wrap_content或match_parent，你最好在textview.post（）中调用TextUtils.ellipsize;

tv.post(new Runnable() {
        @Override
        public void run() {
            tv.setText(TextUtils.ellipsize(tv.getText(), (TextPaint) tv.getPaint(), tv.getWidth() - tv.getPaddingRight() - tv.getPaddingLeft(), TextUtils.TruncateAt.END));
        }
    });

Answer 3

你应该在跨越文本成为SpannedEllipsizer之前将其包装起来，你可以在这里找到完美的分辨率：这是EllipsisSpannedContainer，当省略号可见时，它将忽略省略号位置的跨度。 https://github.com/lsjwzh/FastTextView/blob/master/widget.FastTextView/src/main/java/android/text/EllipsisSpannedContainer.java 第207行向您展示了如何使用EllipsisSpannedContainer。 https://github.com/lsjwzh/FastTextView/blob/master/widget.FastTextView/src/main/java/com/lsjwzh/widget/text/FastTextView.java

android imagepan图像是单行textview中的剪切错误

3 个答案: