TextView练习

添加一个新的activity

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    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.helloword;

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 view) {
                //跳转到TextView演示界面
                Intent intent = new Intent(MainActivity.this,TextViewActivity.class);
                startActivity(intent);
            }
        });
    }
}

添加导入成功，继续操作⏬

activity_text_view.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    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="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/tv_text1"
        android:textColor="#000000"
        android:textSize="80sp"
        android:maxLines="1"
        android:ellipsize="end"
        android:layout_marginTop="20dp"/>



    <TextView
        android:id="@+id/tv_3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="读书"
        android:textColor="#000000"
        android:textSize="24sp"
        android:layout_marginTop="20dp"
        android:drawableRight="@drawable/icon_read" />




    <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"
        android:layout_marginTop="20dp"
        />


    <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="20dp"
        />

    <TextView
        android:id="@+id/tv_6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        android:text="狂奔的蜗牛狂奔的蜗牛狂奔的蜗牛狂奔的蜗牛狂奔的蜗牛"
        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>

string.xml

<resources>
    <string name="app_name">HelloWordstring>
    <string name="tv_text1">狂奔的蜗牛string>
resources>

TextViewActivity

package com.example.helloword;

import androidx.appcompat.app.AppCompatActivity;

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

public class TextViewActivity extends AppCompatActivity {

    private TextView mTv4,mTv5;//声明空间
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_text_view);
        mTv4 = findViewById(R.id.tv_4);//找到空间
        mTv4.getPaint().setFlags(Paint.STRIKE_THRU_TEXT_FLAG);//中划线
        mTv4.getPaint().setAntiAlias(true);//去除中划线锯齿

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