虽然是自己做的 还是不太懂 都是看网上的方法自己总结的 如果大家有质量好的demo 请分享一下
主要就是一个方法 几个变量限制 xml文件就不贴了 普通的TextView
public class TextViewActivity extends Activity {private TextView tv;private String status = "up";private String str = "Android是一种基于Linux的自由及开放源代码的操作系统，，主要使用于移动设备，如智能手机和平板电脑，由Google公司和开放手机联盟领导及开发。";private String str_show = "";private int maxlength = 50;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);tv = (TextView) findViewById(R.id.textView1);if (str.length() < maxlength) {tv.setText(str);} else {changStatus();}}private void changStatus() {tv.setText("");Drawable drawable = null;if (status.equals("down")) {drawable = getResources().getDrawable(R.drawable.icon_arrow_up);status = "up";str_show = str;tv.setMaxLines(10000);} else if (status.equals("up")) {drawable = getResources().getDrawable(R.drawable.icon_arrow_down);status = "down";tv.setMaxLines(2);str_show = str.substring(0, maxlength);str_show += "…";}String spanString = str_show;spanString = spanString.substring(0, spanString.length());drawable.setBounds(0, 0, drawable.getIntrinsicWidth(),drawable.getIntrinsicHeight());SpannableString spannable = new SpannableString(spanString.toString()+ "s");ImageSpan span = new ImageSpan(drawable, ImageSpan.ALIGN_BASELINE);spannable.setSpan(span, spanString.toString().length(), spanString.toString().length() + "s".length(),Spannable.SPAN_INCLUSIVE_EXCLUSIVE);ClickableSpan rightClickableSpan = new ClickableSpan() {@Overridepublic void onClick(View view) {changStatus();}};spannable.setSpan(rightClickableSpan, spanString.toString().length(),spanString.toString().length() + "s".length(),Spannable.SPAN_INCLUSIVE_EXCLUSIVE);tv.setText(spannable);tv.setMovementMethod(new MyTouch());}}
走过的路成为背后的风景，不能回头不能停留，若此刻停留，
