UI组件之TextView

• 文字大小、颜色
• 显示不下使用...
• 文字+icon
• 中划线、下划线
• 跑马灯

练习代码

activity_main.xml

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

    <Button
        android:id="@+id/btn_textview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="TextView"/>
</LinearLayout>

MainActivity.java

package com.example.helloworld;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

    private Button mBtnTextView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mBtnTextView = findViewById(R.id.btn_textview);
        mBtnTextView.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v){
             //跳转到TextView页面
                Intent intent = new Intent(MainActivity.this,TextViewActivity.class);
                startActivity(intent);
            }

                                        }
        );
    }
}

activity_text_view.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".TextViewActivity"
    android:padding="20dp">
    <TextView
        android:id="@+id/tv_1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/tv_test"
        android:textColor="#000000"
        android:textSize="24sp"/>

    <TextView
        android:id="@+id/tv_2"
        android:layout_width="100dp"
        android:layout_height="wrap_content"
        android:maxLines="1"
        android:ellipsize="end"
        android:text="@string/tv_test"
        android:textColor="#000000"
        android:textSize="24sp"
        android:layout_marginTop="10dp"/>

    <TextView
        android:id="@+id/tv_3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="筛选"
        android:drawableRight="@drawable/icon_arrow_off"
        android:drawablePadding="5dp"
        android:textColor="#000000"
        android:textSize="24sp"
        android:layout_marginTop="10dp"/>

    <TextView
        android:id="@+id/tv_4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/tv_test"
        android:textColor="#000000"
        android:textSize="24sp"
        android:layout_marginTop="10dp"/>

    <TextView
        android:id="@+id/tv_5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/tv_test"
        android:textColor="#000000"
        android:textSize="24sp"
        android:layout_marginTop="10dp"/>


    <TextView
        android:id="@+id/tv_6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text=""
        android:textColor="#000000"
        android:textSize="24sp"
        android:layout_marginTop="10dp"/>

    <TextView
        android:id="@+id/tv_7"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="嘿嘿嘿嘿嘿嘿嘿嘿嘿嘿嘿嘿嘿嘿嘿嘿嘿嘿嘿嘿嘿嘿嘿"
        android:textColor="#000000"
        android:textSize="24sp"
        android:layout_marginTop="10dp"
        android:singleLine="true"
        android:ellipsize = "marquee"
        android:marqueeRepeatLimit="marquee_forever"
        android:focusable="true"
        android:focusableInTouchMode="true"
        android:clickable="true"/>

</LinearLayout>

TextViewActivity.java

package com.example.helloworld;

import android.graphics.Paint;
import android.os.Bundle;
import android.text.Html;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

public class TextViewActivity extends AppCompatActivity {

    private TextView mTv4;
    private TextView mTv5;
    private TextView mTv6;
    private TextView mTv7;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_text_view);
        mTv4 = findViewById(R.id.tv_4);
        mTv4.getPaint().setFlags(Paint.STRIKE_THRU_TEXT_FLAG); //中划线
        mTv4.getPaint().setAntiAlias(true);  //去除锯齿

        mTv5 = findViewById(R.id.tv_5);
        mTv5.getPaint().setFlags(Paint.UNDERLINE_TEXT_FLAG); //下划线

        mTv6 = findViewById(R.id.tv_6);
        mTv6.setText(Html.fromHtml("<u>哈哈哈哈哈哈</u>"));

        mTv7 = findViewById(R.id.tv_7);
        mTv7.setSelected(true);
    }
}