android常用封装－－－ BaseActivity

最新推荐文章于 2025-05-17 14:20:06 发布

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本文介绍了一个用于Android应用开发中的BaseActivity抽象类实现。该类实现了Activity生命周期的扩展功能，如初始化视图、数据和事件等，并提供了关闭所有Activity、获取当前Activity等实用方法。

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public abstract class BaseActivity extends Activity {
    /**
     * 记录处于前台的Activity
     */
    private static BaseActivity mForegroundActivity = null;
    /**
     * 记录所有活动的Activity
     */
    private static final List<BaseActivity> mActivities = new LinkedList<BaseActivity>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        initView();
        initFindViewById();
        initData();
        initEvent();

        // initActionBar();
    }


    @Override
    protected void onResume() {
        mForegroundActivity = this;
        super.onResume();
    }

    @Override
    protected void onPause() {
        mForegroundActivity = null;
        super.onPause();
    }

    abstract protected void initView();

    abstract protected void initData();

    protected void initActionBar() {

    }

    /**
     * 关闭所有Activity
     */
    public static void finishAll() {
        List<BaseActivity> copy;
        synchronized (mActivities) {
            copy = new ArrayList<BaseActivity>(mActivities);
        }
        for (BaseActivity activity : copy) {
            activity.finish();
        }
    }

    /**
     * 关闭所有Activity，除了参数传递的Activity
     */
    public static void finishAll(BaseActivity except) {
        List<BaseActivity> copy;
        synchronized (mActivities) {
            copy = new ArrayList<BaseActivity>(mActivities);
        }
        for (BaseActivity activity : copy) {
            if (activity != except)
                activity.finish();
        }
    }

    /**
     * 是否有启动的Activity
     */
    public static boolean hasActivity() {
        return mActivities.size() > 0;
    }

    /**
     * 获取当前处于前台的activity
     */
    public static BaseActivity getForegroundActivity() {
        return mForegroundActivity;
    }

    /**
     * 获取当前处于栈顶的activity，无论其是否处于前台
     */
    public static BaseActivity getCurrentActivity() {
        List<BaseActivity> copy;
        synchronized (mActivities) {
            copy = new ArrayList<BaseActivity>(mActivities);
        }
        if (copy.size() > 0) {
            return copy.get(copy.size() - 1);
        }
        return null;
    }

    protected void initFindViewById() {

    }

    protected void initEvent() {

    }

    /**
     * 退出应用
     */
    public void exitApp() {
        finishAll();
        android.os.Process.killProcess(android.os.Process.myPid());
    }
}