Android学习之Textview的使用

TextView显示文本控件

示例一：显示文本（url、不同大小、字体、颜色）

示例二：单击链接弹出Activity

示例三：使用TextView实现跑马灯的效果

示例一：

显示文本（url、不同大小、字体、颜色）

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.example.administrator.textviewdemo.MainActivity">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/textview1"
        android:padding="20sp"/>

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/textview2"
        android:autoLink="all"
        android:padding="20sp"/>
</LinearLayout>

MainActivity.java

public class MainActivity extends AppCompatActivity {

    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);
        //添加一段html的标志
        String html = "<font color='red'>I Love android</font><br>";
        html+="<font color='#0000ff'><big><i>I Love android</i></big></font><p>";
        html+="<big><a href='http://www.baidu.com'>百度</a></big>";
        CharSequence charSequence = Html.fromHtml(html);
        textView1.setText(charSequence);
        //点击的时候产生超链接
        textView1.setMovementMethod(LinkMovementMethod.getInstance());

        //在Activity_main_xml中已经设置了android:autoLink="all"
        String textString = "我的URL：http://www.sina.com\n";
        textString += "我的电话：9878798789";
        textView2.setText(textString);

    }
}

示例二：

单击链接弹出Activity

MainActivity.java

public class MainActivity extends AppCompatActivity {

    private TextView textView1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        textView1 = (TextView) findViewById(R.id.textview1);

        String str1 = "显示Activity1";
        //SpannableString主要用来拆分字符串
        SpannableString spannableString1 = new SpannableString(str1);

        spannableString1.setSpan(new ClickableSpan() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(MainActivity.this,Activity1.class);
                startActivity(intent);
            }
        }, 0, str1.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        textView1.setText(spannableString1);
        textView1.setMovementMethod(LinkMovementMethod.getInstance());
    }
}

Activity1.java

public class Activity1 extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_1);
        setTitle("这是Activity1");
    }
}
 

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.example.administrator.textviewdemo.MainActivity">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/textview1"
        android:padding="20sp"/>

</LinearLayout>

示例三：

使用TextView实现跑马灯的效果

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.example.administrator.textviewdemo.MainActivity">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/textview1"
        android:singleLine="true"
        android:ellipsize="marquee"
        android:marqueeRepeatLimit="marquee_forever"
        android:focusable="true"
        android:focusableInTouchMode="true"/>

</LinearLayout>

MainActivity.java

public class MainActivity extends AppCompatActivity {

    private TextView textView1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        textView1 = (TextView) findViewById(R.id.textview1);
        //这种格式的话可以在滚动中点击进行链接
        String html ="<big><a href='http://www.baidu.com'>百度一下</a></big>";
        html+= "【珠海市公安局】遇到这些问题怎么破：一、骗子说网上有你的通缉令，公检法电话找你做笔录。二、物品遗失哪里可以发寻物启示？三、如何辨别谣言？微信关注“珠海公安”，不用你花一分钱的贴身安全秘书。";
        html+="<big><a href='http://www.baidu.com'>百度一下</a></big>";
        CharSequence charSequence = Html.fromHtml(html);
        textView1.setText(charSequence);
        textView1.setMovementMethod(LinkMovementMethod.getInstance());

    }
}