Usage of TextView in android

This article describes TextView4 common usage:

1. How to display text (URL, text of different sizes, fonts, and colors)

Activity_main.xml

MainActivity. java

Package com. example. android_textview; import android. OS. bundle; import android. app. activity; import android. text. html; import android. text. method. linkMovementMethod; import android. widget. textView; public class MainActivity extends Activity {private TextView textView1, textView2; @ Override protected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); textView1 = (TextView) findViewById (R. id. textview1); textView2 = (TextView) findViewById (R. id. textview2); // textview1 String html = "I love android
"; Html + ="I love android
"; Html + ="Baidu"; CharSequence charSequence = Html. fromHtml (html); textView1.setText (charSequence); textView1.setMovementMethod (LinkMovementMethod. getInstance (); // a hyperlink is generated when you click. // Textview2 String text = "\ n my URL: http://www.sina.com \ n"; text + = "my mailbox: 123@163.com \ n"; text + = "my phone: 13956789918 \ n "; textView2.setText (text); textView2.setMovementMethod (LinkMovementMethod. getInstance ());}}

2. Display emoticon images and text in TextView

Image directory:

Activity_main.xml

MainActivity. java

Package com. android. mytextview; import java. lang. reflect. field; import android. OS. bundle; import android. app. activity; import android. graphics. color; import android. graphics. drawable. drawable; import android. text. html; import android. text. html. imageGetter; import android. text. method. linkMovementMethod; import android. view. menu; import android. widget. textView; public class MainActivity extends Activity {private TextView textView; @ Override protected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); textView = (TextView) findViewById (R. id. textview); // textview4 textView. setTextColor (Color. BLACK); textView. setBackgroundColor (Color. WHITE); textView. setTextSize (20); String html2 = "Image 1 Image 2 Image 3
"; Html2 + =" Image 4 image 5 "; CharSequence charSequence2 = Html. fromHtml (html2, new ImageGetter () {public Drawable getDrawable (String source) {// obtain information about system resources, such as Drawable drawable = getResources (). getDrawable (getResourceId (source); // compress the third image by 50% if (source. equals ("http://www.2cto.com/uploadfile/Collfiles/20140419/2014041908232829. ") {drawable. setBounds (0, 0, drawable. getIntrinsicWidth ()/2, drawable. getIntrinsic Height ()/2);} else {drawable. setBounds (0, 0, drawable. getIntrinsicWidth (), drawable. getIntrinsicHeight ();} return drawable ;}}, null); textView. setText (charSequence2); textView. setMovementMethod (LinkMovementMethod. getInstance ();} public int getResourceId (String name) {try {// obtain the Field object based on the variable name of the resource ID, which is implemented using the java reflection boarding system. Field field = R. drawable. class. getField (name); // obtains and returns the value of the Field (static variable) of the resource id, using the reflection mechanism. Return Integer. parseInt (field. get (null ). toString ();} catch (Exception e) {// TODO: handle finished tione. printStackTrace () ;}return 0 ;}}

Note: Chapter 3 is compressed according to the proportion of 50%, and Chapter 4 is a hyperlink.

3. Click the link to bring up the Activity

Click "show Activity1"

Click "show Activity2"

Activity_main.xml

MainActivity. java

Package com. android. mytextview; import android. OS. bundle; import android. app. activity; import android. content. intent; import android. text. spannableString; import android. text. spanned; import android. text. method. linkMovementMethod; import android. text. style. clickableSpan; import android. view. view; import android. widget. textView; public class MainActivity extends Activity {private TextView textView1, textView2; @ Override protected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); textView1 = (TextView) findViewById (R. id. textview1); textView2 = (TextView) findViewById (R. id. textview2); String text1 = "show Activity1"; String text2 = "show Activity2"; SpannableString s1 = new SpannableString (text1); SpannableString s2 = new SpannableString (text2 ); s1.setSpan (new ClickableSpan () {@ Overridepublic void onClick (View widget) {// TODO Auto-generated method stubIntent intent = new Intent (MainActivity. this, Activity1.class); startActivity (intent) ;}}, 0, text1.length (), Spanned. SPAN_EXCLUSIVE_EXCLUSIVE); s2.setSpan (new ClickableSpan () {@ Overridepublic void onClick (View arg0) {// TODO Auto-generated method stubIntent intent = new Intent (MainActivity. this, Activity2.class); startActivity (intent) ;}}, 0, text2.length (), Spanned. SPAN_EXCLUSIVE_EXCLUSIVE); textView1.setText (s1); textView2.setText (s2); textView1.setMovementMethod (LinkMovementMethod. getInstance (); textView2.setMovementMethod (LinkMovementMethod. getInstance ());}}

Activity1.java

package com.android.mytextview;import android.app.Activity;import android.os.Bundle;public class Activity1 extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setTitle("Activity1");}}

Activity2.java

package com.android.mytextview;import android.app.Activity;import android.os.Bundle;public class Activity2 extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setTitle("Activity2");}}

4. Use TextView to achieve the effect of a lawn lamp

Activity_main.xml

MainActivity. java

Package com. example. android_textview; import android. OS. bundle; import android. app. activity; import android. text. html; import android. text. method. linkMovementMethod; import android. widget. textView; public class MainActivity extends Activity {private TextView textView1; @ Override protected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main) ; TextView1 = (TextView) findViewById (R. id. textview1); // textview1 String html = "on the evening of June 23, April 17, Sina Weibo finally successfully logged on to the Nasdaq exchange and issued 16.8 million shares. The final issue was priced at $17, at the lower limit of the previously proposed release price range. At this price, Sina Weibo will raise $0.2856 billion, lower than expected. "; CharSequence charSequence = Html. fromHtml (html); textView1.setText (charSequence); textView1.setMovementMethod (LinkMovementMethod. getInstance (); // a hyperlink is generated when you click. }}