1月11日 演示代码

1.main--------------------------------------
package com.example.firstapp;

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);
}

});
}
}
2.TextView------------------------------------------
package com.example.firstapp;

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;//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);//去除锯齿
}
}

3.文字大小颜色 activity_text_view.xml------------------------
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/tv_1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/tv_test1"
android:textColor="#000000"
android:textSize="30sp"/>
</LinearLayout>