Android自学之路3

Textview组件
具有的一些功能
*文字大小颜色
*如果文字显示不下则剩余使用…
*文字加icon
*中划线，下划线
MainActivity类

package com.example.myapplication;

import androidx.appcompat.app.AppCompatActivity;

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

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演示界面
                Intent intent =new Intent(MainActivity.this,TextviewActivity.class);
                startActivity(intent);
            }
        });
    }
}

TextviewActivity类

package com.example.myapplication;

import androidx.appcompat.app.AppCompatActivity;

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

public class TextviewActivity extends AppCompatActivity {

    private TextView mtv4,mtv5,mtv6;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_textview);
        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


    }
}

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>

activity_textview.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"
    tools:context=".TextviewActivity"
    android:orientation="vertical"
    android:padding="20dp">
<TextView
    android:id="@+id/tv_1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/tv_text1"
    android:textColor="#000000"
    android:textSize="24sp"/>
    <TextView
        android:id="@+id/tv_2"
        android:layout_width="100dp"
        android:layout_height="wrap_content"
        android:text="@string/tv_text1"
        android:maxLines="1"
        android:textColor="#000000"
        android:ellipsize="end"
        android:textSize="24sp"
        android:layout_margin="10dp"/>
    <TextView
        android:id="@+id/tv_3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="筛选"
        android:drawableRight="@drawable/exp1"
        android:textColor="#000000"
        android:textSize="24sp"
        android:layout_margin="10dp"/>
    <TextView
        android:id="@+id/tv_4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/tv_text1"
        android:textColor="#000000"
        android:textSize="24sp"/>
    <TextView
        android:id="@+id/tv_5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/tv_text1"
        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="123456789987654321123456987123456789987456321"
        android:textColor="#000000"
        android:textSize="24sp"
        android:singleLine="true"
        android:ellipsize="marquee"
        android:marqueeRepeatLimit="marquee_forever"
        android:focusable="true"
        android:focusableInTouchMode="true"
        android:clickable="true"
        />


</LinearLayout>

drawable所用文件图片
exp1.png