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);