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增加ExpendTextView(textView增加...全文按钮)

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This commit is contained in:
kehaoyuan
2018-06-05 11:52:11 +08:00
parent 16bc7b1e75
commit ee44b1986f
8 changed files with 251 additions and 63 deletions
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107
app/src/main/java/com/gh/common/view/ExpendTextView.java Normal file
View File

@ -0,0 +1,107 @@
package com.gh.common.view;
import android.content.Context;
import android.os.Build;
import android.support.v4.content.ContextCompat;
import android.text.Layout;
import android.text.SpannableStringBuilder;
import android.text.Spanned;
import android.text.TextPaint;
import android.text.method.LinkMovementMethod;
import android.text.style.ClickableSpan;
import android.util.AttributeSet;
import android.view.View;
import com.gh.gamecenter.R;
public class ExpendTextView extends android.support.v7.widget.AppCompatTextView {
private CharSequence mSnapshotText;
private String mExpendText = "...全文";
private int mMaxLines = 3; // 由于sdk版本限制(getMaxLines) 这里设置默认值
private boolean mInitLayout = false;
private boolean mOpenLayout = false;
public ExpendTextView(Context context) {
super(context);
}
public ExpendTextView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public ExpendTextView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
mMaxLines = getMaxLines();
}
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
super.onLayout(changed, left, top, right, bottom);
if (mInitLayout && !mOpenLayout && getLineCount() > mMaxLines) {
mSnapshotText = getText();
mInitLayout = false;
showExpendButton();
}
}
@Override
public void setText(CharSequence text, BufferType type) {
mInitLayout = true;
super.setText(text, type);
}
private void showExpendButton() {
Layout layout = getLayout();
int start = layout.getLineStart(0);
int lastLineEnd = layout.getLineEnd(mMaxLines - 1);
int lastLineStart = layout.getLineStart(mMaxLines - 1);
float lastLineRight = layout.getLineRight(mMaxLines - 1);
int viewWidth = getWidth() - getPaddingRight() - getPaddingLeft();
TextPaint paint = getPaint();
float expendTextWidth = paint.measureText(mExpendText);
CharSequence content = mSnapshotText.subSequence(start, lastLineEnd);
if (viewWidth - lastLineRight > expendTextWidth) {
content = content.toString().trim() + mExpendText;
} else {
CharSequence lastText = mSnapshotText.subSequence(lastLineStart, lastLineEnd);
for (int i = 0; i < lastText.length(); i++) {
CharSequence sequence = lastText.subSequence(0, i);
float w = paint.measureText(sequence.toString());
if (viewWidth - w > expendTextWidth) {
content = mSnapshotText.subSequence(start, lastLineStart + i) + mExpendText;
}
}
}
SpannableStringBuilder msp = new SpannableStringBuilder(content);
int length = msp.length();
msp.replace(length - mExpendText.length(), length, mExpendText);
msp.setSpan(new ClickableSpan() {
@Override
public void updateDrawState(TextPaint ds) {
super.updateDrawState(ds);
ds.setColor(ContextCompat.getColor(getContext(), R.color.theme));
ds.setUnderlineText(false);
}
@Override
public void onClick(View widget) {
mOpenLayout = true;
setMaxLines(Integer.MAX_VALUE);
setText(mSnapshotText);
}
}, length - mExpendText.length(), length, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
setText(msp);
setMovementMethod(LinkMovementMethod.getInstance());
}
}

4
app/src/main/java/com/gh/gamecenter/adapter/viewholder/GameImageViewHolder.java
View File

@ -13,10 +13,10 @@ import butterknife.BindView;
*/
public class GameImageViewHolder extends BaseRecyclerViewHolder {
@BindView(R.id.home_game_iv_image)
@BindView(R.id.game_image_icon)
public SimpleDraweeView image;
@BindView(R.id.home_game_line)
@BindView(R.id.game_image_line)
public View line;
public GameImageViewHolder(View itemView) {

15
app/src/main/java/com/gh/gamecenter/qa/questions/detail/QuestionsDetailAdapter.java
View File

@ -180,9 +180,9 @@ public class QuestionsDetailAdapter extends ListAdapter<AnswerEntity> {
addTag(holder.mTagRl, mQuestionsDetailEntity.getCommunityName(), true);
String description = mQuestionsDetailEntity.getDescription();
if (TextUtils.isEmpty(description)) {
holder.mDesRl.setVisibility(View.GONE);
holder.mDes.setVisibility(View.GONE);
} else {
holder.mDesRl.setVisibility(View.VISIBLE);
holder.mDes.setVisibility(View.VISIBLE);
holder.mDes.setText(description);
}
if (!TextUtils.isEmpty(mQuestionsDetailEntity.getMe().getMyAnswerId())) {
@ -210,17 +210,6 @@ public class QuestionsDetailAdapter extends ListAdapter<AnswerEntity> {
holder.mTitle.setText(mQuestionsDetailEntity.getTitle());
holder.mAnswercount.setText(mContext.getString(R.string.ask_answer_count, mQuestionsDetailEntity.getAnswersCount()));
holder.concernCount.setText(mQuestionsDetailEntity.getFollowCount() + "人关注");
holder.mDesAll.setOnClickListener((v) -> {
mIsExpand = true;
holder.mDesAll.setVisibility(View.GONE);
holder.mDes.setMaxLines(Integer.MAX_VALUE);// 展开
holder.mDes.setText(mQuestionsDetailEntity.getDescription());
});
holder.mDes.getViewTreeObserver().addOnGlobalLayoutListener(() -> {
int lineCount = holder.mDes.getLineCount();
holder.mDesAll.setVisibility(lineCount > 3 && !mIsExpand ? View.VISIBLE : View.GONE);
});
}
private void addTag(FlexboxLayout mTagRl, String tag, boolean isLastTag) {

4
app/src/main/java/com/gh/gamecenter/qa/questions/detail/QuestionsDetailItemViewHolder.java
View File

@ -24,8 +24,6 @@ public class QuestionsDetailItemViewHolder extends BaseRecyclerViewHolder {
public TextView mTitle;
@BindView(R.id.questionsdetail_item_des)
public TextView mDes;
@BindView(R.id.questionsdetail_item_des_rl)
public View mDesRl;
@BindView(R.id.questionsdetail_item_pic1)
public SimpleDraweeView mPic1;
@BindView(R.id.questionsdetail_item_pic2)
@ -36,8 +34,6 @@ public class QuestionsDetailItemViewHolder extends BaseRecyclerViewHolder {
public TextView mAnswercount;
@BindView(R.id.questionsdetail_item_picll)
public LinearLayout mImgLl;
@BindView(R.id.questionsdetail_item_des_all)
public View mDesAll;
@BindView(R.id.questionsdetail_answer_tv)
TextView answerTv;
@BindView(R.id.questionsdetail_answer)