第一种
导入依赖
dependencies { compile 'com.hymane.expandtextview:library:1.0.2' }
简单粗暴
定义xml布局
<com.hymane.expandtextview.ExpandTextView android:id="@+id/etv" android:layout_width="match_parent" android:layout_height="wrap_content" android:paddingBottom="8dp" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="8dp" app:contentTextSize="14sp" app:expandHint="点击展开" app:foldHint="点击收回" app:textContentColor="?android:attr/textColorPrimary" app:textHintColor="?android:attr/textColorPrimary" app:textTitleColor="?android:attr/textColorSecondary" app:titleText="标题党" app:titleTextSize="16sp">
自定义设置
etv.setIndicateImage(R.drawable.ic_arrow_down_light_round); etv.setMinVisibleLines(5); etv.setContentTextSize(15); etv.setTitleTextSize(16); etv.setHintTextSize(12); etv.setContent("text"); etv.setHintTextColor(Color.parseColor("#913242")); etv.setOnReadMoreListener(new OnReadMoreClickListener() { @Override public void onExpand() { Toast.makeText(MainActivity.this, "expand", Toast.LENGTH_SHORT).show(); } @Override public void onFold() { Toast.makeText(MainActivity.this, "fold", Toast.LENGTH_SHORT).show(); } });
可选项
//设置标题 public void setTitle(String title); //设置内容文本 public void setContent(String content); //展开后显示的文字 public void setFoldHint(String foldHint); //折叠起来后显示的文字 public void setExpandHint(String expandHint) ; //标题颜色 public void setTitleTextColor(@ColorInt int titleTextColor); //内容字体颜色 public void setContentTextColor(@ColorInt int contentTextColor); //查看更多字体颜色 public void setHintTextColor(@ColorInt int hintTextColor); //查看更多前面小图标(夜间模式请更换对应图标,或者使用兼容主题的图标) public void setIndicateImage(@DrawableRes Drawable indicateImage); public void setIndicateImage(@DrawableRes int indicateImageRes); //最小显示行数 public void setMinVisibleLines(int minVisibleLines); /** * 设置字体大小 * @param titleTextSize 单位为sp */ public void setTitleTextSize(float titleTextSize); /** * 设置字体大小 * @param contentTextSize 单位为sp */ public void setContentTextSize(float contentTextSize); } /** * 设置字体大小 * @param hintTextSize 单位为sp */ public void setHintTextSize(float hintTextSize); /** * 动画执行时间 * @param animationDuration 单位毫秒 */ public void setAnimationDuration(int animationDuration); /** * 设置监听 * @param mListener 展开和收缩按钮点击时回调 */ public void setOnReadMoreListener(OnReadMoreClickListener mListener);
第二种
1先定义一个XML布局
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <TextView android:id="@+id/desc_tv" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="4.0dip" android:gravity="center_vertical" android:textColor="#ff000000" android:textSize="14.0dip" /> <!--可以灵活的将收藏的按钮至右 至左 居中 --> <TextView android:id="@+id/desc_op_tv" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="4.0dip" android:gravity="right" android:singleLine="true" android:textColor="#ff576b95" android:textSize="14.0dip" android:visibility="gone" /> </LinearLayout>
2再定义一个工具类
public class CollapsibleTextView extends LinearLayout implements View.OnClickListener { //默认展示几行 private static final int DEFAULT_MAX_LINE_COUNT = 3; private static final int COLLAPSIBLE_STATE_NONE = 0; private static final int COLLAPSIBLE_STATE_SHRINKUP = 1; private static final int COLLAPSIBLE_STATE_SPREAD = 2; private TextView desc; private TextView descOp; private String shrinkup; private String spread; private int mState; private boolean flag; public CollapsibleTextView(Context context, AttributeSet attrs) { super(context, attrs); // 两种定义形式 // shrinkup = context.getString(R.string.desc_shrinkup); // spread = context.getString(R.string.desc_spread); shrinkup="收起"; spread="展开"; View view = inflate(context, R.layout.collapsible_textview, this); view.setPadding(0, -1, 0, 0); desc = (TextView) view.findViewById(R.id.desc_tv); descOp = (TextView) view.findViewById(R.id.desc_op_tv); descOp.setOnClickListener(this); } public CollapsibleTextView(Context context) { this(context, null); } /** 1. 2. 对外提供暴漏的方法,为文本提供数据 3. @param charSequence 文本内容是什么 4. @param bufferType */ public final void setDesc(CharSequence charSequence, TextView.BufferType bufferType) { desc.setText(charSequence, bufferType); mState = COLLAPSIBLE_STATE_SPREAD; requestLayout(); } @Override public void onClick(View v) { flag = false; requestLayout(); } @Override protected void onLayout(boolean changed, int l, int t, int r, int b) { super.onLayout(changed, l, t, r, b); if (!flag) { flag = true; if (desc.getLineCount() <= DEFAULT_MAX_LINE_COUNT) { mState = COLLAPSIBLE_STATE_NONE; descOp.setVisibility(View.GONE); desc.setMaxLines(DEFAULT_MAX_LINE_COUNT + 1); } else { post(new InnerRunnable()); } } } class InnerRunnable implements Runnable { @Override public void run() { if (mState == COLLAPSIBLE_STATE_SPREAD) { desc.setMaxLines(DEFAULT_MAX_LINE_COUNT); descOp.setVisibility(View.VISIBLE); descOp.setText(spread); mState = COLLAPSIBLE_STATE_SHRINKUP; } else if (mState == COLLAPSIBLE_STATE_SHRINKUP) { desc.setMaxLines(Integer.MAX_VALUE); descOp.setVisibility(View.VISIBLE); descOp.setText(shrinkup); mState = COLLAPSIBLE_STATE_SPREAD; } } } }
3使用
<com.guorentong.learn.myapplication.CollapsibleTextView android:id="@+id/desc_collapse_tv" android:layout_width="wrap_content" android:layout_height="wrap_content" />
4使用
CollapsibleTextView tv = (CollapsibleTextView) findViewById(R.id.desc_collapse_tv); tv.setDesc("文本", TextView.BufferType.NORMAL);