安卓项目实战之BaseActivity的封装（已更新）
BaseFragment的封装见博文：具有懒加载功能的 Fragment基类封装和一般的Fragment基类封装
BaseActivity封装如下：
public abstract class BaseActivity extends AppCompatActivity {
private WeakReference<Activity> weakReference = null;
private boolean isFullScreen; // 设置是否去掉状态栏，全屏显示
private LoadingDialog dialog; // 子类共享的进度提示dialog
public void setFullScreen(boolean fullScreen) {
isFullScreen = fullScreen;
}
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// 设置要不要显示状态栏
setStatusShow();
// 设置是否全屏（去掉状态栏和标题栏）
if (isFullScreen) {
setIsFullScreen();
}
//设置BaseActivity的布局
setContentView(setLayout());
//绑定ButterKnife
ButterKnife.bind(this);
// 注册,
if (!EventBus.getDefault().isRegistered(this)) {
EventBus.getDefault().register(this);
}
//将activity添加到管理列表中
if (weakReference == null) {
weakReference = new WeakReference<Activity>(this);
}
ActivityManager.getInstance().addActivity(weakReference.get());
// 设置所有activity的状态栏颜色，推荐2个常用的第三方库：StatusBarUtil
// https://github.com/laobie/StatusBarUtil
// https://github.com/gyf-dev/ImmersionBar
StatusBarUtil.setStatusBarColor(this, getResources().getColor(R.color.colorAccent));
// 初始化页面
initView();
// 子类中需要获取Activity异常销毁时的值的时候使用
initState(savedInstanceState);
// 设置数据
initData();
// 设置监听
setListener();
}
protected void setStatusShow() {
}
protected void setListener() {
}
protected void initData() {
}
// 当页面因为异常销毁需要保存数据时调用该方法
protected void initState(Bundle savedInstanceState) {
}
protected abstract int setLayout();
protected void initView() {
}
/**
* EventBus默认绑定一个事件，防止源码里面去找方法的时候找不到报错。
*
* @param activity
*/
@Subscribe
public void onEvent(BaseActivity activity) { }
@Override
protected void onDestroy() {
super.onDestroy();
// 取消注册
EventBus.getDefault().unregister(this);
//将activity从列表中移除
ActivityManager.getInstance().removeActivity(weakReference.get());
// 处理华为手机mlastsrvview内存泄露问题
FixMemLeakUtils.fixLeak(MyApplicationLike.getInstance());
}
/**
* 窗口全屏
*/
private void setIsFullScreen() {
this.getWindow().setFlags(
WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
requestWindowFeature(Window.FEATURE_NO_TITLE);
}
/**
* 进度弹框提示
*/
private void showDialogInfo(String info) {
if(dialog == null){
dialog = LoadingDialog.getInstance(info);
dialog.setCancelable(false);
dialog.setCanceledOnTouchOutside(false);
}else{
dialog.setTitle(info);
}
dialog.show();
}
/**
* 重写getResources()方法，让APP的字体不受系统设置字体大小影响
*/
@Override
public Resources getResources() {
Resources res = super.getResources();
Configuration config = new Configuration();
config.setToDefaults();
res.updateConfiguration(config, res.getDisplayMetrics());
return res;
}
}
上面的BaseActivity封装只是作为一个简单的参考，您还可以添加更多的东西，比如控制跳转的方法，设置屏幕是否旋转等等的代码逻辑。
关于上面 initState(savedInstanceState); 方法的使用，主要是用来处理当因为特殊原因（比如系统内存不足时）导致activity重建时保存一些数据，具体细节可参见我的另一篇博文：安卓项目实战之：Activity和Fragment重新创建时状态的保存和恢复
Activity的栈管理类ActivityManager：
public class ActivityManager {
private List<Activity> activityList = new ArrayList<>();
private ActivityManager() {
}
public static ActivityManager getInstance() {
return ActivityManagerHolder.Instantce;
}
/**
* 静态内部类获取单例
*/
static class ActivityManagerHolder {
public static ActivityManager Instantce = new ActivityManager();
}
/**
* 添加activity
* @param activity
*/
public void addActivity(Activity activity){
if (!activityList.contains(activity)) {
activityList.add(activity);
}
}
/**
* 移除activity
* @param activity
*/
public void removeActivity(Activity activity){
if (activityList.contains(activity)) {
activityList.remove(activity);
}
}
/**
* 关闭所有的activity，退出应用
*/
public void finishActivitys(){
if (activityList != null && !activityList.isEmpty()) {
for (Activity activity1 : activityList) {
activity1.finish();
}
activityList.clear();
}
}
}
如果想在其他页面销毁Activity，可以调用如下代码：
MyActivity.getInstance().finish();
处理华为手机mlastsrvview内存泄露的FixMemLeakUtils工具类:
public class FixMemLeakUtils {
private static Field field;
private static boolean hasField = true;
public static void fixLeak(Context context) {
if (!hasField) {
return;
}
InputMethodManager imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
if (imm == null) {
return;
}
String[] arr = new String[]{"mLastSrvView"};
for (String param : arr) {
try {
if (field == null) {
try {
field = imm.getClass().getDeclaredField(param);
} catch (NoSuchFieldException e) {
e.printStackTrace();
}
}
if (field == null) {
hasField = false;
}
if (field != null) {
field.setAccessible(true);
field.set(imm, null);
}
} catch (Throwable t) {
t.printStackTrace();
}
}
}
}
Dialog加载中提示：
自定义对话框的实现使用了：对话框库FlycoDialog-Master，具体使用参见博客：安卓项目实战之强大的Dialog对话框库FlycoDialog-Master
public class LoadingDialog extends BaseDialog<LoadingDialog> {
private static LoadingDialog loadingDialog = null;
private final String info;
private TextView tvInfo;
private LoadingDialog(Context context,String info) {
super(context);
this.info = info;
}
// 单例设计
public static LoadingDialog getInstance(String str) {
if (loadingDialog == null) {
loadingDialog = new LoadingDialog(MyApplicationLike.getInstance(),str);
}
return loadingDialog;
}
@Override
public View onCreateView() {
widthScale(0.35f);
// dimEnabled(false); // 去掉背景遮罩层
View inflate = View.inflate(mContext, R.layout.loading_dialog, null);
tvInfo = inflate.findViewById(R.id.tvInfo);
tvInfo.setText(info);
inflate.setBackgroundDrawable(
CornerUtils.cornerDrawable(Color.parseColor("#ffffff"), dp2px(5)));
return inflate;
}
public void setTitle(String str){
tvInfo.setText(str);
}
@Override
public void setUiBeforShow() {
}
}