Android布局颜色的编程更改
我有一个课程,应该是显示一个白色的屏幕,并通过许多颜色褪色Android布局颜色的编程更改,android,background-color,runnable,Android,Background Color,Runnable,我有一个课程,应该是显示一个白色的屏幕,并通过许多颜色褪色 public class SecondActivity extends Activity implements Runnable { protected PowerManager.WakeLock mWakeLock; boolean isrunning = true; int red = 0, blue = 0, green = 0; @Override public void onCreate(Bundle savedInst
public class SecondActivity extends Activity implements Runnable {
protected PowerManager.WakeLock mWakeLock;
boolean isrunning = true;
int red = 0, blue = 0, green = 0;
@Override
public void onCreate(Bundle savedInstanceState) .... etc
TextView btnstart = (TextView) findViewById(R.id.btnstart);
btnstart.setTypeface(font1);
btnstart.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
MediaPlayer mediaPlayer = MediaPlayer.create(
getApplicationContext(), R.raw.button);
try {
mediaPlayer.start();
mediaPlayer.setLooping(false);
} catch (Exception e) {
e.printStackTrace();
}
{
run();
}
;
}
});
那我的车就可以跑了
@Override
public void run() {
while (isrunning) {
try {
red = red + 1;
blue = blue + 2;
green = green + 3;
if (green > 240){
red = 0;
blue = 0;
green = 0;
}
LinearLayout colorchanger = (LinearLayout) findViewById(R.id.colorchange);
colorchanger.setBackgroundColor(Color.argb(255, red, blue,
green));
Thread.sleep(100);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
我按下应用程序强制关闭按钮时出现以下问题。如果我取出“while(isrunning)”并将其替换为If(isrunning),则所有功能都正常,但我希望在单击按钮后颜色保持不变
我肯定我做错了什么
也许用一个布局不是最好的方法,我必须用一个矩形(屏幕大小)来做?在onDraw过程中更改颜色?处理程序非常适合这种情况
// Initialize your handler:
Handler h = new Handler();
// Start fading:
h.postDelayed(color_fade, 0);
// Set up your runnable:
private Runnable color_fade = new Runnable(){
public void run(){
/*
* Do your color and layout changes here.
*/
h.postDelayed(this, 100); // loop with 100 ms delay.
}
};