这篇文章主要介绍了 Android 修改系统关机动画的实现的相关资料, 需要的朋友可以参考下
Android 是一种基于 Linux 的自由及开放源代码的操作系统,主要使用于移动设备,如智能手机和平板电脑,由 Google 公司和开放手机联盟领导及开发。尚未有统一中文名称,中国大陆地区较多人使用 "安卓" 或 "安致"。
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:
- 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:
来源: http://www.phperz.com/article/17/0320/301124.html