我在我最近的項(xiàng)目用到這個(gè)效果，給大家分享下
https://github.com/zhaoweihaoChina/hnuplus
1. 在drawable文件夾創(chuàng)建一些漸變顏色的資源
color1.xml
<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"> <gradient android:startColor="#614385" android:endColor="#516395" android:angle="0"/></shape>
color2.xml
<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"> <gradient android:startColor="#5f2c82" android:endColor="#49a09d" android:angle="45"/></shape>
color3.xml
<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"> <gradient android:startColor="#4776E6" android:endColor="#8E54E9" android:angle="90"/></shape>
color4.xml
<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"> <gradient android:startColor="#7141e2" android:endColor="#d46cb3" android:angle="135"/></shape>
2. 創(chuàng)建一個(gè)用到上面創(chuàng)建的漸變色的動(dòng)畫序列，命名為animation_list.xml,放進(jìn)去drawable文件夾
<?xml version="1.0" encoding="utf-8"?><animation-list xmlns:android="http://schemas.android.com/apk/res/android"> <item android:drawable="@drawable/color1" android:duration="10000" /> <item android:drawable="@drawable/color2" android:duration="10000" /> <item android:drawable="@drawable/color3" android:duration="10000" /> <item android:drawable="@drawable/color4" android:duration="10000" /></animation-list>
3. 將上面已經(jīng)創(chuàng)建好的動(dòng)畫序列應(yīng)用到你layout的背景頂層的view中
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:background="@drawable/animation_list" android:id="@+id/container"> <!-- Child Views --></LinearLayout>
4.在你的activity中用AnimationDrawable去實(shí)現(xiàn)過渡效果
LinearLayout container = (LinearLayout) findViewById(R.id.container);AnimationDrawable anim = (AnimationDrawable) container.getBackground();anim.setEnterFadeDuration(6000);anim.setExitFadeDuration(2000);// 開始播放動(dòng)畫：在onResume方法中開始播放漸變動(dòng)畫@Overrideprotected void onResume() { super.onResume(); if (anim != null && !anim.isRunning()) anim.start();} // 停止播放動(dòng)畫：在onPause方法中停止播放漸變動(dòng)畫@Overrideprotected void onPause() { super.onPause(); if (anim != null && anim.isRunning()) anim.stop();}將狀態(tài)欄設(shè)置透明（去除狀態(tài)欄）
values/styles.xml
<resources> <style name="Theme.AppTheme.TranslucentStatusBar" parent="Theme.AppCompat.Light.NoActionBar" /> </resources>
values-v19/styles.xml
<resources> <style name="Theme.AppTheme.TranslucentStatusBar" parent="Theme.AppCompat.Light.NoActionBar"> <item name="android:windowTranslucentStatus">true</item> </style> </resources>
values-v21/styles.xml
<resources> <style name="Theme.AppTheme.TranslucentStatusBar" parent="Theme.AppCompat.Light.NoActionBar"> <item name="android:statusBarColor">@android:color/transparent</item> </style> </resources>
values-v23/styles.xml
<resources> <style name="Theme.AppTheme.TranslucentStatusBar" parent="Theme.AppCompat.Light.NoActionBar"> <item name="android:statusBarColor">@android:color/transparent</item> <item name="android:windowLightStatusBar">true</item> </style> </resources>
public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // 加入下面的代碼 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { findViewById(android.R.id.content).setSystemUiVisibility( View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_STABLE); } setContentView(R.layout.activity_splash); } } <activity android:name=".MainActivity" android:theme="@style/Theme.AppTheme.TranslucentStatusBar" />總結(jié)
以上所述是小編給大家介紹的Android中創(chuàng)建類似Instagram的漸變背景效果，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會(huì)及時(shí)回復(fù)大家的。在此也非常感謝大家對武林網(wǎng)網(wǎng)站的支持！
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