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時間：2021-04-22 16:12:15 阅读：0 評論：0 收藏：0 [點我收藏+]

標簽：目的 ora ted find center focus 控制單行 normal

开发工具：Android Studio

TestView（線性布局）

1、基本屬性：

layout_width：組件寬度（單位dp）

layout_height：組件高度

id：組件id

text：文本內容

textColor：字體顔色

textStyle：字體風格，normal（無效果）、bold（加粗）、itallc（斜體）

textSize：字體大小（單位sp，爲了不同手機的適配）

background：背景

gravity：內容的對其方向，TextView中是文字、ImageView中是圖片等

android:shadowRadius：陰影模糊程度（0.1爲字體顔色，一般建議3.0）

android:shadowColor：陰影顔色

android:shadowDx：陰影在水平方向的偏移，橫坐標

android:shadowDy：陰影在豎直方向的偏移，縱坐標

code:

activity_main.xml

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:orientation="vertical">
 6 
 7     <TextView
 8         android:id="@+id/tv_one"
 9 
10         android:layout_width="200dp"
11         android:layout_height="200dp"
12 
13         android:text="@string/tv_on"
14         android:textColor="@color/red"
15         android:textStyle="bold"
16         android:textSize="30sp"
17 
18         android:shadowColor="@color/colorPrimary"
19         android:shadowRadius="3.0"
20         android:shadowDx="10.0"
21         android:shadowDy="10.0"
22 
23         android:background="@color/colorAccent"
24 
25         android:layout_gravity="center_vertical"
26 
27         />
28 
29 </LinearLayout>

MainActivity.java

 1 package com.example.myapplicationnew;
 2 
 3 import androidx.appcompat.app.AppCompatActivity;
 4 
 5 import android.os.Bundle;
 6 import android.widget.TextView;
 7 
 8 public class MainActivity extends AppCompatActivity {
 9 
10     @Override
11     protected void onCreate(Bundle savedInstanceState) {
12         super.onCreate(savedInstanceState);
13         setContentView(R.layout.activity_main);
14 
15         //無效
16         TextView tv_one = findViewById(R.id.tv_one);
17         tv_one.setText("world");
18     }
19 }

string.xml

1 <resources>
2     <string name="app_name">My Application New</string>
3     <string name="tv_on">hellow</string>
4 </resources>

colors.xml

1 <?xml version="1.0" encoding="utf-8"?>
2 <resources>
3     <color name="colorPrimary">#6200EE</color>
4     <color name="colorPrimaryDark">#3700B3</color>
5     <color name="colorAccent">#03DAC5</color>
6     <color name="red">#FFFF0000</color>
7 </resources>

效果

技术图片

2、實現跑馬燈效果的TextView

android:stringLine：内容單行显示

android:focusable：是否可以獲取焦點

android:focusableInTouchMode：用于控制視圖在接觸模式下是否可以聚焦

android:ellipsize：在哪裏可以省略文本

android:marqueeRepeatLimit：字母動畫重複的次數

code

activity_main.xml

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:orientation="vertical">
 6 
 7     <com.example.myapplicationnew.MyTextView
 8         android:id="@+id/tv_one"
 9 
10         android:layout_width="match_parent"
11         android:layout_height="200dp"
12 
13         android:layout_gravity="center_vertical"
14 
15         android:text="@string/tv_on"
16         android:textColor="@color/red"
17         android:textStyle="bold"
18         android:textSize="30sp"
19 
20         android:shadowColor="@color/colorPrimary"
21         android:shadowRadius="3.0"
22         android:shadowDx="10.0"
23         android:shadowDy="10.0"
24 
25         android:singleLine="true"
26         android:ellipsize="marquee"
27         android:marqueeRepeatLimit="marquee_forever"
28         android:focusable="true"
29         android:focusableInTouchMode="true"
30 
31         android:background="@color/colorAccent">
32 
33     </com.example.myapplicationnew.MyTextView>
34 
35 
36 </LinearLayout>

or

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:orientation="vertical">
 6 
 7     <TextView
 8         android:id="@+id/tv_one"
 9 
10         android:layout_width="match_parent"
11         android:layout_height="200dp"
12 
13         android:layout_gravity="center_vertical"
14 
15         android:text="@string/tv_on"
16         android:textColor="@color/red"
17         android:textStyle="bold"
18         android:textSize="30sp"
19 
20         android:shadowColor="@color/colorPrimary"
21         android:shadowRadius="3.0"
22         android:shadowDx="10.0"
23         android:shadowDy="10.0"
24 
25         android:singleLine="true"
26         android:ellipsize="marquee"
27         android:marqueeRepeatLimit="marquee_forever"
28         android:focusable="true"
29         android:focusableInTouchMode="true"
30 
31         android:background="@color/colorAccent">
32         
33         <requestFocus/>
34 
35 </TextView>
36 
37 
38 </LinearLayout>

MainActivity.java

 1 package com.example.myapplicationnew;
 2 
 3 import androidx.appcompat.app.AppCompatActivity;
 4 
 5 import android.os.Bundle;
 6 import android.widget.TextView;
 7 
 8 public class MainActivity extends AppCompatActivity {
 9 
10     @Override
11     protected void onCreate(Bundle savedInstanceState) {
12         super.onCreate(savedInstanceState);
13         setContentView(R.layout.activity_main);
14 
15         //TextView tv_one = findViewById(R.id.tv_one);
16         //tv_one.setText("world");
17     }
18 }

MyTextView.java

 1 package com.example.myapplicationnew;
 2 
 3 import android.content.Context;
 4 import android.util.AttributeSet;
 5 import android.widget.TextView;
 6 
 7 import androidx.annotation.Nullable;
 8 
 9 //創建MyTextView，繼承TextView，目的是獲取焦點
10 public class MyTextView extends androidx.appcompat.widget.AppCompatTextView {
11     public MyTextView(Context context) {
12         super(context);
13     }
14 
15     public MyTextView(Context context, @Nullable AttributeSet attrs) {
16         super(context, attrs);
17     }
18 
19     public MyTextView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
20         super(context, attrs, defStyleAttr);
21     }
22 
23     @Override
24     //獲取焦點
25     public boolean isFocused() {
26         return true;
27     }
28 }

string.xml

1 <resources>
2     <string name="app_name">My Application New</string>
3     <string name="tv_on">01 Good evening! Good evening! Good evening! Good evening!</string>
4 </resources>

activity_main.xml再加入允許點擊，點一下才開始跑馬燈

1 android:clickable="true"

效果

標簽：目的 ora ted find center focus 控制單行 normal

原文地址：https://www.cnblogs.com/0xiaoyu/p/14686883.html

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