android.support.v4.app.FragmentActivity#runOnUiThread ( )源码实例Demo

/**
 * 回调所有数据
 *
 * @param context     FragmentActivity
 * @param imageItems  所有文件
 * @param allVideoSet 当加载所有媒体库文件时，默认会生成一个全部视频的文件夹，是本地虚拟的文件夹
 */
private void notifyMediaItem(final FragmentActivity context, final ArrayList<ImageItem> imageItems,
                             final ImageSet allVideoSet) {
    context.runOnUiThread(new Runnable() {
        @Override
        public void run() {
            if (context.isDestroyed()) {
                return;
            }
            if (mediaItemProvider != null) {
                mediaItemProvider.providerMediaItems(imageItems, allVideoSet);
            }

            if (mLoaderManager != null) {
                mLoaderManager.destroyLoader(LOADER_ID);
            }
        }
    });
}
 

/**
 * distribute the apps and refresh ListView
 *
 * @param context
 * @param appsInfo
 */
private void initAppsAndRefreshUi(final FragmentActivity context, final List<AppInfoBean> appsInfo) {
    // refresh ui need run on ui thread
    // and remember the change data should'n in background thread
    context.runOnUiThread(new Runnable() {
        @Override
        public void run() {
            // clear data
            apps.clear();
            // distribute apps
            AppLockDao dao = new AppLockDao(context);
            for (AppInfoBean app : appsInfo) {
                // if in locked list
                if (isNeededApp(dao, app.getPackageName())) {
                    // add to locked list
                    apps.add(app);
                }
            }
            // notify update ListView
            adapter.notifyDataSetChanged();
            // hide loading bar
            pvLoading.setVisibility(View.GONE);
        }
    });
}
 

@Override
protected Object doInBackground(Object[] params) {
    final Random rand = new Random();

    FragmentActivity activity = getActivity();

    while (true) {
        final int a = rand.nextInt(3) + 1;

        activity.runOnUiThread(new Runnable() {
            @Override
            public void run() {
                infiniteCircleBusyIndicator.setAngleModifier(a);
            }
        });

        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}
 

@Override
public void setTitle(String title) {
    FragmentActivity activity = getActivity();
    if (activity != null) {
        activity.runOnUiThread(() -> tvTitle.setText(title));
    }
}
 

/**
 * 回调预加载的媒体文件，主线程
 *
 * @param context    FragmentActivity
 * @param imageItems 预加载列表
 */
private void notifyPreloadItem(final FragmentActivity context, final ArrayList<ImageItem> imageItems) {
    context.runOnUiThread(new Runnable() {
        @Override
        public void run() {
            if (context.isDestroyed()) {
                return;
            }
            preloadProvider.providerMediaItems(imageItems);
            preloadProvider = null;
        }
    });
}
 

/**
 * Runs a runnable on the UI thread if possible.
 * 
 * @param runnable the runnable
 */
private void runOnUiThread(Runnable runnable) {
  FragmentActivity fragmentActivity = getActivity();
  if (fragmentActivity != null) {
    fragmentActivity.runOnUiThread(runnable);
  }
}
 

@Override
protected Object doInBackground(Object[] objects) {

    final Random rand = new Random();
    int i = 0;

    FragmentActivity activity = getActivity();

    while (i < 84) {
        final int a = i;
        activity.runOnUiThread(new Runnable() {
            @Override
            public void run() {
            multiBusyIndicator1.setValue(a);
            }
        });

        i = i + rand.nextInt(20) + 1;

        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    activity.runOnUiThread(new Runnable() {
        @Override
        public void run() {
            multiBusyIndicator1.setValue(83);
            busy1Done = true;
            if (busy1Done && busy2Done && busy3Done)
                loadingStatusText.setText("done");
        }
    });

    return null;
}
 

@Override
protected Object doInBackground(Object[] objects) {

    final Random rand = new Random();
    int i = 0;

    FragmentActivity activity = getActivity();

    while (i < 531) {
        final int a = i;
        activity.runOnUiThread(new Runnable() {
            @Override
            public void run() {
            multiBusyIndicator2.setValue(a);
            }
        });

        i = i + rand.nextInt(90) + 1;

        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    activity.runOnUiThread(new Runnable() {
        @Override
        public void run() {
            multiBusyIndicator2.setValue(530);
            busy2Done = true;
            if (busy1Done && busy2Done && busy3Done)
                loadingStatusText.setText("done");
        }
    });

    return null;
}
 

@Override
protected Object doInBackground(Object[] objects) {

    final Random rand = new Random();
    int i = 0;

    FragmentActivity activity = getActivity();

    while (i < 963) {
        final int a = i;
        activity.runOnUiThread(new Runnable() {
            @Override
            public void run() {
            multiBusyIndicator3.setValue(a);
            }
        });

        i = i + rand.nextInt(190) + 1;

        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    activity.runOnUiThread(new Runnable() {
        @Override
        public void run() {
            multiBusyIndicator3.setValue(962);
            busy3Done = true;
            if (busy1Done && busy2Done && busy3Done)
                loadingStatusText.setText("done");
        }
    });

    return null;
}
 

@Override
protected Object doInBackground(Object[] objects) {

    final Random rand = new Random();
    int i = 0;

    FragmentActivity activity = getActivity();

    while (i < 315) {
        final int a = i;
        activity.runOnUiThread(new Runnable() {
            @Override
            public void run() {
            rectangleBusyIndicator.setValue(a);
            }
        });

        i = i + rand.nextInt(60) + 1;

        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    activity.runOnUiThread(new Runnable() {
        @Override
        public void run() {
        rectangleBusyIndicator.setValue(314);
        }
    });

    return null;
}
 

@Override
protected Object doInBackground(Object[] objects) {

    final Random rand = new Random();
    int i = 0;

    FragmentActivity activity = getActivity();

    while (i < 84) {
        final int a = i;
        activity.runOnUiThread(new Runnable() {
            @Override
            public void run() {
            transBusyIndicator.setValue(a);
            }
        });

        i = i + rand.nextInt(20) + 1;

        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    activity.runOnUiThread(new Runnable() {
        @Override
        public void run() {
            transBusyIndicator.setValue(83);
        }
    });

    return null;
}
 

@Override
protected Object doInBackground(Object[] objects) {

    final Random rand = new Random();
    int i = 0;

    FragmentActivity activity = getActivity();

    while (i < 103) {
        final int a = i;
        activity.runOnUiThread(new Runnable() {
            @Override
            public void run() {
            circleBusyIndicator.setValue(a);
            }
        });

        i = i + rand.nextInt(20) + 1;

        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    activity.runOnUiThread(new Runnable() {
        @Override
        public void run() {
        circleBusyIndicator.setValue(103);
        }
    });

    return null;
}
 

@Override
public void onProgress(final long progress, final long max) {
    final ProgressDialog dialog = (ProgressDialog) getDialog();
    FragmentActivity activity = getActivity();

    if (dialog != null && activity != null) {
        activity.runOnUiThread(new Runnable() {
            @Override
            public void run() {
                dialog.setMax((int) max);
                dialog.setProgress((int) progress);
            }
        });
    }
}