失眠网 > textview点击展开全部或收起内容过长显示省略号设置行间距字间距跑马灯显示

textview点击展开全部或收起内容过长显示省略号设置行间距字间距跑马灯显示

时间：2021-12-22 12:46:45

跑马灯显示

android:ellipsize="marquee"android:singleLine="true"

paomad.setSelected(true);

使用RelativeLayout可以使用图标点击旋转，展开textview或收缩textview

<RelativeLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:orientation="horizontal"android:layout_marginLeft="15dp"android:layout_marginRight="6dp"android:layout_marginTop="7dp"android:layout_marginBottom="7dp"android:gravity="center_vertical"><TextViewandroid:id="@+id/onete"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentStart="true"android:layout_centerVertical="true"android:text="@string/wgms"android:textColor="@color/numtext"android:textSize="15dp" /><TextViewandroid:id="@+id/wgmiaostext"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginLeft="80dp"android:ellipsize="end"android:lineSpacingExtra="4dp"android:lines="2"android:text="申报过期申报报过期申报过期申过期申报过期申报过期申报报报报报过期申报过期"android:textColor="@color/hometextc"android:textSize="15dp" /><ImageViewandroid:id="@+id/more_image"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentEnd="true"android:layout_alignParentBottom="true"android:src="@mipmap/xj_03"/></RelativeLayout>

Java代码如下

private boolean ifupdown=true;

@OnClick({R.id.backligxwbdata,R.id.more_image})public void onClick(View view) {switch (view.getId()) {case R.id.backligxwbdata:onBackPressed();break;case R.id.more_image:if (ifupdown){Animation anim =new RotateAnimation(0f, 180f, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);anim.setFillAfter(true); // 设置保持动画最后的状态anim.setDuration(500); // 设置动画时间anim.setInterpolator(new AccelerateInterpolator()); // 设置插入器more_image.startAnimation(anim);//图标旋转向上或向下ifupdown = !ifupdown;double d = (double) weiguidesc.length() / 18;//文本长度除以每行字符长度int okcprogress = (int) (Math.floor(d))+1;//除数取整，也就是行数Log.i("lgq","lllll===-"+weiguidesc.length()+"......."+okcprogress);wgmiaostext.setLines(okcprogress);//展开全部}else {Animation anim =new RotateAnimation(180f, 0f, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);anim.setFillAfter(true); // 设置保持动画最后的状态anim.setDuration(500); // 设置动画时间anim.setInterpolator(new AccelerateInterpolator()); // 设置插入器more_image.startAnimation(anim);wgmiaostext.setLines(2);//收缩为原始两行ifupdown = !ifupdown;}break;}}

实现展开收起方法2：

（1）资源

attrs.xml

<?xml version="1.0" encoding="utf-8"?><resources><declare-styleable name="ExpandTextView"><attr name="showLines" format="integer"/></declare-styleable></resources>

layout_expand_text.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="/apk/res/android"android:orientation="vertical"android:layout_width="match_parent"android:layout_height="match_parent"><TextViewandroid:id="@+id/contentText"android:layout_width="match_parent"android:layout_height="wrap_content"android:textColor="@color/color_232323"android:textSize="14sp"android:text=""/><TextViewandroid:id="@+id/textState"android:layout_width="match_parent"android:layout_height="wrap_content"android:textSize="14sp"android:textColor="@color/color_8290AF"android:paddingTop="5dp"android:paddingBottom="5dp"android:text=""/></LinearLayout>

（2）自定义textview

public class ExpandTextView extends LinearLayout {public static final int DEFAULT_MAX_LINES = 3;//最大的行数private TextView contentText;private TextView textState;private int showLines;private ExpandStatusListener expandStatusListener;private boolean isExpand;public ExpandTextView(Context context) {super(context);initView();}public ExpandTextView(Context context, AttributeSet attrs) {super(context, attrs);initAttrs(attrs);initView();}public ExpandTextView(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);initAttrs(attrs);initView();}private void initView() {setOrientation(LinearLayout.VERTICAL);LayoutInflater.from(getContext()).inflate(R.layout.layout_expand_text, this);contentText = (TextView) findViewById(R.id.contentText);contentText.setLineSpacing(8,1);//行间距contentText.setLetterSpacing(0.5f);//字间距if(showLines > 0){contentText.setMaxLines(showLines);}textState = (TextView) findViewById(R.id.textState);textState.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View view) {String textStr = textState.getText().toString().trim();if("全文".equals(textStr)){contentText.setMaxLines(Integer.MAX_VALUE);textState.setText("收起");setExpand(true);}else{contentText.setMaxLines(showLines);textState.setText("全文");setExpand(false);}//通知外部状态已变更if(expandStatusListener != null){expandStatusListener.statusChange(isExpand());}}});}private void initAttrs(AttributeSet attrs) {TypedArray typedArray = getContext().getTheme().obtainStyledAttributes(attrs, R.styleable.ExpandTextView, 0, 0);try {showLines = typedArray.getInt(R.styleable.ExpandTextView_showLines, DEFAULT_MAX_LINES);}finally {typedArray.recycle();}}public void setText(final CharSequence content){contentText.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {@Overridepublic boolean onPreDraw() {// 避免重复监听contentText.getViewTreeObserver().removeOnPreDrawListener(this);int linCount = contentText.getLineCount();if(linCount > showLines){if(isExpand){contentText.setMaxLines(Integer.MAX_VALUE);textState.setText("收起");}else{contentText.setMaxLines(showLines);textState.setText("全文");}textState.setVisibility(View.VISIBLE);}else{textState.setVisibility(View.GONE);}return true;}});contentText.setText(content);}public void setExpand(boolean isExpand){this.isExpand = isExpand;}public boolean isExpand(){return this.isExpand;}public void setExpandStatusListener(ExpandStatusListener listener){this.expandStatusListener = listener;}public static interface ExpandStatusListener{void statusChange(boolean isExpand);}}

调用：

<com.example.my35.ExpandTextViewandroid:id="@+id/expand_textView"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_marginLeft="10dp"android:ellipsize="end"android:lineSpacingExtra="3dp"android:maxLines="5"android:textSize="16sp"app:layout_constraintRight_toRightOf="parent"/>

ExpandTextView textView1 =findViewById(R.id.expand_textView);textView1.setText("分为非我仿佛威风威风为任务范围范围分为非危房危房危房威锋网分为非仍无法" +"为非危房危房危房威锋网分为非仍无法危房违法未范围范围分为非危房危房任务分为分为分为我分为非我仿佛威风威" +"风为任务范围范围分为非危房危房危房威锋网分为非仍无法危房违法未范围范围分为非危房危房任务分为分为分为我");