textview 显示图文信息，html文本，实现activity的跳转、跑马灯效果。

来源：互联网发布：brooks brothers 知乎编辑：程序博客网时间：2024/05/16 17:55

public class MainActivity extends Activity {private TextView textView1, textView2, textView3;//通过文件名称来获取这个文件中的 id。public int getResourceId(String name) {try {// 根据资源的ID获得Field对象，使用反射机制Field field = R.drawable.class.getField(name);// 获得并返回资源ID的字段（静态变量的）值，使用反射机制。return Integer.parseInt(field.get(null).toString());} catch (Exception e) {// TODO: handle exception}return 0;}@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);textView1 = (TextView) this.findViewById(R.id.textView2);textView2 = (TextView) this.findViewById(R.id.textView3);//在布局中设置了autoLink=“all”,文字有链接等就可以调用系统的。textView3 = (TextView) this.findViewById(R.id.textView1);String html = "<font color='red'>O love </font><br>";html += "<font color='#0000ff'><big><i>o lvoe</i></big></font><p>";html += "<big><a href ='http://www.baidu.com'>baidu</a></big>";CharSequence charSequence = Html.fromHtml(html);textView1.setText(charSequence);textView1.setMovementMethod(LinkMovementMethod.getInstance());String text = "URL链接是 :http://www.sina.com\n";text += "email:abde@126.com\n";text += "电话 : +86 1234567890";textView2.setText(text);textView2.setMovementMethod(LinkMovementMethod.getInstance());String html1 = "图像一：<a href='http://www.baidu.com'><img src='ic_launcher'></a>";//注意src中输入的不能带文件后缀名。CharSequence charSequence2=Html.fromHtml(html1, new ImageGetter() {@Overridepublic Drawable getDrawable(String source) {// TODO Auto-generated method stub//获得系统资源的信息.Drawable drawable=getResources().getDrawable(getResourceId(source));//根据返回的id获取资源信息。if (source.equals("ic_launcher")) {drawable.setBounds(0, 0, drawable.getIntrinsicWidth()/2, drawable.getIntrinsicHeight()/2);}else {drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());}return drawable;}}, null);textView3.setText(charSequence2);textView3.setMovementMethod(LinkMovementMethod.getInstance());}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}@Overridepublic boolean onOptionsItemSelected(MenuItem item) {// Handle action bar item clicks here. The action bar will// automatically handle clicks on the Home/Up button, so long// as you specify a parent activity in AndroidManifest.xml.int id = item.getItemId();if (id == R.id.action_settings) {return true;}return super.onOptionsItemSelected(item);}}

实现activity跳转是如下代码

textView4 = (TextView) this.findViewById(R.id.textView4);String textString = "显示activity";// 主要是用来拆分字符串,实现点这部分文字的任何一点都可以触发。SpannableString spannableString = new SpannableString(textString);spannableString.setSpan(new ClickableSpan() {@Overridepublic void onClick(View widget) {// TODO Auto-generated method stubIntent intent = new Intent();intent.setClass(MainActivity.this, second.class);startActivity(intent);}}, 0, textString.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);textView4.setText(spannableString);textView4.setMovementMethod(LinkMovementMethod.getInstance());

接下来是实现跑马灯效果，文字过多实现文字来回移动，并且可以实现超链接。

布局中需要添加的额外属性有

    <TextView        android:id="@+id/textView5"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignLeft="@+id/textView4"        android:layout_below="@+id/textView4"        android:layout_marginTop="53dp"        android:ellipsize="marquee"        android:focusable="true"        android:focusableInTouchMode="true"        android:marqueeRepeatLimit="marquee_forever"        android:singleLine="true"        android:text="实现跑马灯效果" />    <!--android:ellipsize = "end"　　  省略号在结尾android:ellipsize = "start" 　　省略号在开头android:ellipsize = "middle"     省略号在中间android:ellipsize = "marquee"  跑马灯 android:marqueeRepeatLimit="marquee_forever"  一直在执行跑马灯效果    -->

activity中代码：

textView5 = (TextView) this.findViewById(R.id.textView5);String htmlPaoMaDeng = "<a href='http://www.baidu.com'>baidu</a>welcome to android's city,i'm android body,hehe!!!!!!!";CharSequence ch = Html.fromHtml(htmlPaoMaDeng);textView5.setText(ch);textView5.setMovementMethod(LinkMovementMethod.getInstance());

这样就可以实现android的跑马灯效果，并且在其中加入超链接。

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