在android 系统移植做自己的移动设备，肯定会遇到更改开机或者关机画面，配置自己产品logo 这点是必须的，这些都要在源码中修改，然后编译，下面给大家介绍个关机动画修改，一个简单示例！
文件路径：frameworks\base\services\core\java\com\android\server\power\shutdownthread.java
在beginshutdownsequence()方法中：
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private static void beginshutdownsequence(context context) {
...... 3 // throw up an indeterminate system dialog to indicate radio is
// shutting down.
//*********************** 系统默认的dialog ***********************
/*progressdialog pd = new progressdialog(context);
pd.settitle(context.gettext(com.android.internal.r.string.power_off));
pd.setmessage(context.gettext(com.android.internal.r.string.shutdown_progress));
pd.setindeterminate(true);
pd.setcancelable(false);
pd.getwindow().settype(windowmanager.layoutparams.type_keyguard_dialog);
pd.show();*/
//*********************** 替换为自定义的全屏dialog ***********************
point outsize = new point();
dialog dialog = new dialog(context, android.r.style.theme_black_notitlebar_fullscreen);
indeterminateprogressbar view = new indeterminateprogressbar(context);
dialog.getwindow().settype(windowmanager.layoutparams.type_keyguard_dialog);
dialog.getwindow().getwindowmanager().getdefaultdisplay().getsize(outsize); //获取屏幕宽高
dialog.setcontentview(view, new layoutparams(outsize.x, outsize.y)); //设置自定义view宽高为全屏
dialog.show();
......
}
注意：必须要设置 dialog.getwindow().settype(windowmanager.layoutparams.type_keyguard_dialog); 之前忘了加导致什么都不显示
替换的自定义view：
class indeterminateprogressbar extends view {
static final string tag = "progressbar";
private int delaymillis = 30;
private handler mhandler;
private arraylist<entity> entities;
private int width = 0;
// private int height = 0;
private int r = 15;
private int shift = 20;
private int radius = 3;
private int color = color.white;
private long time = 0;
private boolean started = false;
public indeterminateprogressbar(context context) {
super(context);
init();
}
@override
protected void onlayout(boolean changed, int left, int top, int right,
int bottom) {
super.onlayout(changed, left, top, right, bottom);
width = getlayoutparams().width / 2;
// height = getlayoutparams().height;
if (width > 0) {
radius = width / 20;
r = 2 * width / 5;
//shift = width / 2;
shift = width / 1;
}
}
private void init() {
setbackgroundresource(android.r.color.transparent);
mhandler = new handler(new handler.callback() {
@override
public boolean handlemessage(message msg) {
for (entity e : entities) {
e.update();
}
invalidate();
mhandler.sendemptymessagedelayed(0, delaymillis);
time += delaymillis;
return false;
}
});
}
public void setcolor(int color) {
this.color = color;
}
public void stop() {
mhandler.removemessages(0);
started = false;
invalidate();
}
public boolean isstart() {
return started;
}
public void start() {
if (started)
return;
started = true;
time = 0;
entities = new arraylist<indeterminateprogressbar.entity>();
float s = .25f;
entities.add(new entity(0, color, 0));
entities.add(new entity(1 * s, color, delaymillis * 4));
entities.add(new entity(2 * s, color, delaymillis * 8));
entities.add(new entity(3 * s, color, delaymillis * 12));
entities.add(new entity(4 * s, color, delaymillis * 16));
// entities.add(new entity(5 * s, color, delaymillis * 20));
if (mhandler != null)
mhandler.sendemptymessage(0);
}
@override
protected void ondraw(canvas canvas) {
if (entities != null && entities.size() > 0) {
for (entity e : entities) {
e.draw(canvas);
}
}
super.ondraw(canvas);
}
class entity {
private float x;
private float y;
private int color;
private paint paint;
private double sp = 0;
private long delay;
private int sec = 0;
private float pec = 0;
boolean visiable = true;
public float getinterpolation(float input) {
return (float) (math.cos((input + 1) * math.pi) / 2.0f) + 0.5f;
}
public entity(float sp, int color, int delay) {
paint = new paint();
paint.setantialias(true);
paint.setstyle(paint.style.fill);
this.color = color;
this.sp = sp;
this.delay = delay;
paint.setcolor(this.color);
}
public void update() {
if (time < delay)
return;
visiable = true;
pec += 0.03;
if (pec > 1) {
pec = 0;
sec = ++sec == 3 ? 0 : sec;
delay = sec == 0 ? time + delaymillis * 22 : time + delaymillis
* 3;
visiable = sec == 0 ? false : true;
}
double θ = math.pi
* .5
+ (sec == 0 ? 0 : sec * math.pi / sec)
- (sec == 0 ? 0 : sp)
+ (math.pi * (sec == 1 ? 2 : 1) - (sec == 0 ? sp : 0) + (sec == 2 ? sp
: 0)) * getinterpolation(pec);
x = (float) (r / 2 * math.cos(θ)) + shift / 2;
y = (float) (r / 2 * math.sin(θ)) + shift / 2;
}
public void draw(canvas canvas) {
if (!visiable || x == 0 || y == 0)
return;
canvas.save();
canvas.translate(x, y);
canvas.drawcircle(x, y, radius, paint);
canvas.restore();
}
}
@override
protected void onattachedtowindow() {
super.onattachedtowindow();
if (getvisibility() == view.visible) {
start();
}
}
@override
protected void ondetachedfromwindow() {
super.ondetachedfromwindow();
stop();
}
public void setdelaymillis(int delaymillis) {
this.delaymillis = delaymillis;
}
}
效果图：
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