安卓学习记录

Text_View

ctrl+右键可以看到属性
代码整理采用的快捷键是ctrl+alt+L(电脑qq锁定快捷键，退一下qq就行了)

基础属性

字体阴影

<?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_one"
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:background="#A36F5E8E"
        android:gravity="center"
        android:shadowColor="@color/black"
        android:shadowRadius="6"
        android:shadowDx="5"
        android:shadowDy="5"
        android:text="@string/ccs"
        android:textColor="#6332BA"
        android:textSize="30sp"
        android:textStyle="bold">

    </TextView>


</LinearLayout>

跑马灯

activity_main.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">

    <com.example.text1.MyTextview
        android:id="@+id/tv_one"
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:background="#A36F5E8E"
        android:gravity="center"
        android:shadowColor="@color/black"
        android:shadowRadius="6"
        android:shadowDx="5"
        android:shadowDy="5"
        android:singleLine="true"
        android:ellipsize="marquee"
        android:marqueeRepeatLimit="marquee_forever"
        android:focusable="true"
        android:focusableInTouchMode="true"
        android:text="@string/ccs"
        android:textColor="#6332BA"
        android:textSize="30sp"
        android:textStyle="bold">

    </com.example.text1.MyTextview>


</LinearLayout>

MyTextview

方法一（麻烦）：新建一个类

package com.example.text1;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.TextView;

import androidx.annotation.Nullable;

public class MyTextview extends TextView {
    public MyTextview(Context context) {
        super(context);
    }

    public MyTextview(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
    }

    public MyTextview(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    public boolean isFocused() {
        return true;
    }
}

方法二：直接加一句代码：

<requestFocus/>

button