完成游戏详情的展开按钮遮罩效果
This commit is contained in:
juntao
@ -8,7 +8,6 @@ import android.text.Layout;
|
||||
import android.text.SpannableStringBuilder;
|
||||
import android.text.Spanned;
|
||||
import android.text.TextPaint;
|
||||
import android.text.style.BackgroundColorSpan;
|
||||
import android.text.style.ClickableSpan;
|
||||
import android.util.AttributeSet;
|
||||
import android.view.View;
|
||||
@ -23,13 +22,15 @@ public class ExpandTextView extends AppCompatTextView {
|
||||
|
||||
private CharSequence mSnapshotText;
|
||||
|
||||
private String mExpendText = "...全文";
|
||||
private int expandTextBackgroundColor = Color.TRANSPARENT;
|
||||
private String mEndText = "...";
|
||||
private String mExpandText = mEndText + "全文";
|
||||
private boolean mUseGradientAlphaEndText = false;
|
||||
private int mExpandTextBackgroundColor = Color.TRANSPARENT;
|
||||
|
||||
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;
|
||||
private boolean mIsExpanded = false; // 位于 recyclerView 时需要自行在外层管理是否已展开
|
||||
|
||||
private ExpandCallback mExpandCallback;
|
||||
|
||||
@ -42,24 +43,26 @@ public class ExpandTextView extends AppCompatTextView {
|
||||
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
|
||||
mMaxLines = getMaxLines();
|
||||
}
|
||||
TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.ExpandTextView);
|
||||
mExpendText = array.getString(R.styleable.ExpandTextView_expandText) == null ? mExpendText : array.getString(R.styleable.ExpandTextView_expandText);
|
||||
expandTextBackgroundColor = array.getColor(R.styleable.ExpandTextView_expandTextBackgroundColor, expandTextBackgroundColor);
|
||||
array.recycle();
|
||||
TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.ExpandTextView);
|
||||
mUseGradientAlphaEndText = ta.getBoolean(R.styleable.ExpandTextView_useGradientAlphaEndText, false);
|
||||
mEndText = ta.getString(R.styleable.ExpandTextView_endText) == null ? mEndText : ta.getString(R.styleable.ExpandTextView_endText);
|
||||
mExpandText = ta.getString(R.styleable.ExpandTextView_expandText) == null ? mExpandText : ta.getString(R.styleable.ExpandTextView_expandText);
|
||||
mExpandTextBackgroundColor = ta.getColor(R.styleable.ExpandTextView_expandTextBackgroundColor, mExpandTextBackgroundColor);
|
||||
ta.recycle();
|
||||
}
|
||||
|
||||
@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) {
|
||||
if (mInitLayout && !mIsExpanded && getLineCount() > mMaxLines) {
|
||||
mSnapshotText = getText();
|
||||
mInitLayout = false;
|
||||
showExpendButton();
|
||||
showExpandButton();
|
||||
}
|
||||
}
|
||||
|
||||
public void setExpendText(String text) {
|
||||
this.mExpendText = text;
|
||||
this.mExpandText = text;
|
||||
}
|
||||
|
||||
public void setExpandCallback(ExpandCallback callback) {
|
||||
@ -72,7 +75,9 @@ public class ExpandTextView extends AppCompatTextView {
|
||||
super.setText(text, type);
|
||||
}
|
||||
|
||||
private void showExpendButton() {
|
||||
private void showExpandButton() {
|
||||
String finalEndText = "";
|
||||
|
||||
Layout layout = getLayout();
|
||||
int start = layout.getLineStart(0);
|
||||
int lastLineEnd = layout.getLineEnd(mMaxLines - 1);
|
||||
@ -80,28 +85,51 @@ public class ExpandTextView extends AppCompatTextView {
|
||||
float lastLineRight = layout.getLineRight(mMaxLines - 1);
|
||||
|
||||
int viewWidth = getWidth() - getPaddingRight() - getPaddingLeft();
|
||||
int additionalEndTextCount = 0;
|
||||
|
||||
TextPaint paint = getPaint();
|
||||
float expendTextWidth = paint.measureText(mExpendText);
|
||||
float expandTextWidth;
|
||||
if (mUseGradientAlphaEndText) {
|
||||
additionalEndTextCount = 2;
|
||||
expandTextWidth = paint.measureText(mEndText + mExpandText);
|
||||
} else {
|
||||
expandTextWidth = paint.measureText(mExpandText);
|
||||
}
|
||||
|
||||
CharSequence content = mSnapshotText.subSequence(start, lastLineEnd);
|
||||
if (viewWidth - lastLineRight > expendTextWidth) {
|
||||
content = content.toString().trim() + mExpendText;
|
||||
|
||||
if (viewWidth - lastLineRight > expandTextWidth) {
|
||||
// TODO 可能最后一行只有一个字符，这里的 -ADDITIONAL_END_TEXT_COUNT 有隐藏问题
|
||||
if (mUseGradientAlphaEndText) {
|
||||
finalEndText = content.toString().substring(content.length() - additionalEndTextCount, content.length()) + mEndText;
|
||||
content = content.subSequence(0, content.length() - additionalEndTextCount) + finalEndText + mExpandText;
|
||||
} else {
|
||||
content = content.toString().trim() + mExpandText;
|
||||
}
|
||||
} else {
|
||||
CharSequence lastText = mSnapshotText.subSequence(lastLineStart, lastLineEnd);
|
||||
for (int i = lastText.length() - 1; i > 0; i--) {
|
||||
CharSequence sequence = lastText.subSequence(0, i);
|
||||
float w = paint.measureText(sequence.toString());
|
||||
if (viewWidth - w - DisplayUtils.dip2px(5) > expendTextWidth) {
|
||||
content = mSnapshotText.subSequence(start, lastLineStart + i) + mExpendText;
|
||||
if (viewWidth - w - DisplayUtils.dip2px(5) > expandTextWidth) {
|
||||
if (mUseGradientAlphaEndText) {
|
||||
finalEndText = lastText.subSequence(i - additionalEndTextCount, i) + mEndText;
|
||||
content = mSnapshotText.subSequence(start, lastLineStart + i - additionalEndTextCount) + finalEndText + mExpandText;
|
||||
} else {
|
||||
content = mSnapshotText.subSequence(start, lastLineStart + i) + mExpandText;
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
SpannableStringBuilder msp = new SpannableStringBuilder(mSnapshotText);
|
||||
int length = msp.length();
|
||||
int startPosition = content.length() - mExpendText.length();
|
||||
startPosition = startPosition < 0 ? 0 : startPosition;
|
||||
msp.replace(startPosition, length, mExpendText);
|
||||
int startPosition = 0;
|
||||
startPosition = content.length() - finalEndText.length() - mExpandText.length();
|
||||
startPosition = Math.max(startPosition, 0);
|
||||
msp.replace(startPosition, length, finalEndText + mExpandText);
|
||||
|
||||
msp.setSpan(new ClickableSpan() {
|
||||
@Override
|
||||
public void updateDrawState(TextPaint ds) {
|
||||
@ -112,7 +140,7 @@ public class ExpandTextView extends AppCompatTextView {
|
||||
|
||||
@Override
|
||||
public void onClick(View widget) {
|
||||
mOpenLayout = true;
|
||||
mIsExpanded = true;
|
||||
setMaxLines(Integer.MAX_VALUE);
|
||||
setText(mSnapshotText);
|
||||
|
||||
@ -120,15 +148,21 @@ public class ExpandTextView extends AppCompatTextView {
|
||||
mExpandCallback.onExpand();
|
||||
}
|
||||
}
|
||||
}, startPosition + 3, msp.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
|
||||
msp.setSpan(new BackgroundColorSpan(expandTextBackgroundColor), startPosition, msp.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
|
||||
}, startPosition + mEndText.length(), msp.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
|
||||
msp.setSpan(new GradientAlphaTextSpan(), startPosition, startPosition + finalEndText.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
|
||||
|
||||
setText(msp);
|
||||
setMovementMethod(CustomLinkMovementMethod.getInstance());
|
||||
}
|
||||
|
||||
/**
|
||||
* 此方法仅更改标记，不做实际展开的操作
|
||||
*/
|
||||
public void setIsExpanded(boolean isExpanded) {
|
||||
mIsExpanded = isExpanded;
|
||||
}
|
||||
|
||||
public void setExpendMaxLines(int maxLines) {
|
||||
public void setExpandMaxLines(int maxLines) {
|
||||
mMaxLines = maxLines;
|
||||
setMaxLines(maxLines);
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user