我在我最近的项目用到这个效果,给大家分享下
https://github.com/zhaoweihaoChina/hnuplus
1. 在drawable文件夹创建一些渐变颜色的资源
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. 创建一个用到上面创建的渐变色的动画序列,命名为animation_list.xml,放进去drawable文件夹
<?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. 将上面已经创建好的动画序列应用到你layout的背景顶层的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去实现过渡效果
LinearLayout container = (LinearLayout) findViewById(R.id.container);
AnimationDrawable anim = (AnimationDrawable) container.getBackground();
anim.setEnterFadeDuration(6000);
anim.setExitFadeDuration(2000);
// 开始播放动画:在onResume方法中开始播放渐变动画
@Override
protected void onResume() {
super.onResume();
if (anim != null && !anim.isRunning())
anim.start();
}
// 停止播放动画:在onPause方法中停止播放渐变动画
@Override
protected void onPause() {
super.onPause();
if (anim != null && anim.isRunning())
anim.stop();
}
将状态栏设置透明(去除状态栏)
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);
// 加入下面的代码
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" /
总结
以上所述是小编给大家介绍的Android中创建类似Instagram的渐变背景效果,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对ZaLou.Cn网站的支持!