清除图片缓存以及判断网络连接

final File directory = new File(
"/sdcard/Android/data/com.baway.test/cache/xBitmapCache");
clear.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
if (directory != null && directory.exists()
&& directory.isDirectory()) {
for (File item : directory.listFiles()) {
item.delete();
}
Toast.makeText(MainActivity.this, "yiqinghcu", 0).show();
}
}

});

// 判断网络连接状态的方法
ConnectivityManager conn = (ConnectivityManager) MainActivity.this
.getSystemService(Context.CONNECTIVITY_SERVICE);
if (conn != null) {
NetworkInfo info = conn.getActiveNetworkInfo();
if (info != null && info.isConnected()) {
if (info.getState() == NetworkInfo.State.CONNECTED) {
Toast.makeText(MainActivity.this, "网络连接正常", 0).show();
}
}
}