我想逐渐改变按钮颜色,点击它之后.我的意思是,按钮必须具有,例如下一组颜色:默认情况下 – 深蓝色,然后是深蓝色,然后是蓝色,然后是浅蓝色,最后是最亮的蓝色.这只是一个例子,我真
如何改善这个?
public class ActivityExample extends Activity { private changeColorBtn; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_animations); changeColorBtn = (Button) findViewById(R.id.btn_change_color); changeColorBtn.setBackgroundColor(Color.BLACK); changeColorBtn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { changeButtonColor(v); } }); } private void changeButtonColor(View v) { // How many intermediate color will be, and delay in millisecond between them int count = 20, delay = 100; for (int i = 0; i < count; i++) { try { int color = ((ColorDrawable) changeColorBtn.getBackground()) .getColor(); int blue = Color.blue(color), red = Color.red(color), green = Color.green(color); changeColorBtn.setBackgroundColor(Color.rgb(red+10, green+5, blue+3)); Thread.sleep(delay); } catch (InterruptedException inE) { } } } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; }
}
我使用 TransitionDrawable解决了这个问题.您可以按照下一步操作:>在drawable文件夹中创建一个xml文件,并写入如下内容:
`
<?xml version="1.0" encoding="UTF-8"?> <transition xmlns:android="http://schemas.android.com/apk/res/android"> <item android:drawable="@color/color1" /> <item android:drawable="@color/color2" /> </transition>
`
>然后,在你的xml for this button(或其他元素/ View)中你应该在android:background属性中引用这个TransitionDrawable.
>此外,您应该将颜色存储为资源:为此,您必须创建如下的xml:
`
<?xml version="1.0" encoding="UTF-8"?> <resources> <color name="color1">#990000</color> <color name="color2">#cc3311</color> </resources>
`
并将此xml文件保存在/ res / values /文件夹中,将xml命名为color.xml.
>并启动代码转换:
`
int durationMillis = 2000; TransitionDrawable transition = (TransitionDrawable) changeColorBtn.getBackground(); transition.startTransition(durationMillis);
`
这对我有所帮助,我希望它对其他人有用.