# 接口回调进行传值——CallBack应用举例#
### 将数据以接口的形式外露
public class interface_class {
int aaa=3652;
int getdata(CALL call){
call.get_in(aaa);
return 1;
}
}
interface CALL {
void get_in(int abc);
}
看代码：
public class callbacttest {
public static void main(String[] args) {
int x= new interface_class().getdata(new CALL() {
@Override
public void get_in(int bbbb) {
System.out.println(bbbb);
}
});
System.out.println(x);
}
}
结果：
3652
1
---
#Toast优化#
###(解决因Toast的队列显示问题)
import android.content.Context;
import android.widget.Toast;
/**
* Created by Administrator on 2016/9/11.
*/
public class Utils {
private static Toast mToast;
public static void showToast(Context context, String msg, int duration) {
if (mToast == null) {
mToast = Toast.makeText(context, msg, duration);
} else {
mToast.setText(msg);
}
mToast.show();
}
}
---
#popupWindow外部的事件就可以传递给下面的Activity#
那么,如果我想要一个效果,点击外部区域,弹窗不消失,但是点击事件会向下面的activity传递,比如下面是一个WebView,我想点击里面的链接等.
研究了半天，说是要给Window设置一个Flag，
WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
看了源码，这个Flag的设置与否是由一个叫mNotTouchModal的字段控制，但是设置该字段的set方法被标记为@hide。
所以要通过反射的方法调用：
复制代码
/**
* Set whether this window is touch modal or if outside touches will be sent
* to
* other windows behind it.
*
*/
public static void setPopupWindowTouchModal(PopupWindow popupWindow,
boolean touchModal) {
if (null == popupWindow) {
return;
}
Method method;
try {
method = PopupWindow.class.getDeclaredMethod("setTouchModal",
boolean.class);
method.setAccessible(true);
method.invoke(popupWindow, touchModal);
}
catch (Exception e) {
e.printStackTrace();
}
}
复制代码，然后在程序中：
UIUtils.setPopupWindowTouchModal(popupWindow, false);
该popupWindow外部的事件就可以传递给下面的Activity了。
#切换后将EditText光标置于末尾#
charSequence = etdatelimit.getText();
if (charSequence instanceof Spannable) {
Spannable spanText = (Spannable) charSequence;
Selection.setSelection(spanText, charSequence.length());
}
#文件上传#
```
/**
* @param path 要上传的文件路径
* @throws Exception
*/
public void uploadFile(String path) throws Exception {
String url = "http://116.255.193.42:8080/Handler.ashx";
File file = new File(path);
if (file.exists() && file.length() > 0) {
AsyncHttpClient client = new AsyncHttpClient();
com.loopj.android.http.RequestParams requestParams = new com.loopj.android.http.RequestParams();
requestParams.put("uploadfile", file);
// 上传文件
client.post(url, requestParams, new AsyncHttpResponseHandler() {
@Override
public void onSuccess(int statusCode, Header[] headers,
byte[] responseBody) {
// 上传成功后要做的工作
Toast.makeText(ImageDetailActivity.this, "上传成功", Toast.LENGTH_LONG).show();
// progress.setProgress(0);
}
@Override
public void onFailure(int statusCode, Header[] headers,
byte[] responseBody, Throwable error) {
// 上传失败后要做到工作
Toast.makeText(ImageDetailActivity.this, "上传失败", Toast.LENGTH_LONG).show();
}
@Override
public void onRetry(int retryNo) {
// TODO Auto-generated method stub
super.onRetry(retryNo);
// 返回重试次数
}
@Override
public void onProgress(long bytesWritten, long totalSize) {
super.onProgress(bytesWritten, totalSize);
int count = (int) ((bytesWritten * 1.0 / totalSize) * 100);
// 上传进度显示
Log.e("上传 Progress>>>>>", bytesWritten + " / " + totalSize);
}
});
} else {
Toast.makeText(ImageDetailActivity.this, "文件不存在", Toast.LENGTH_LONG).show();
}
}
```
```
/**
* 屏幕旋转时调用此方法
*/
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT) {
// Toast.makeText(MainActivity.this, "现在是竖屏", Toast.LENGTH_SHORT).show();
fl_bottom_menu.setVisibility(View.VISIBLE);
}
if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
// Toast.makeText(MainActivity.this, "现在是横屏", Toast.LENGTH_SHORT).show();
fl_bottom_menu.setVisibility(View.GONE);
}
```
}
# 点击监听接口
```
public class HBDialogRead {
private Dialog dialog;
private Context context;
private OnOKClickListener okClickListener;
public HBDialogRead(Context context) {
this.context = context;
}
public void showDialog(String coin) {
dialog = new Dialog(context, R.style.my_hb_dialog);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);//去掉自定义对话框的tiltle
dialog.setContentView(R.layout.hb_dialog_read);//设置自定义Dialog视图布局
Window window = dialog.getWindow();
window.setGravity(Gravity.CENTER);
dialog.show();
TextView tv_coin = (TextView) dialog.findViewById(R.id.tv_coin);
Button bt_ok = (Button) dialog.findViewById(R.id.bt_ok);
ImageView iv_close = (ImageView) dialog.findViewById(R.id.iv_close);
tv_coin.setText(coin + "");
bt_ok.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (okClickListener != null) {
okClickListener.onOKClick();
}
dialog.dismiss();
}
});
iv_close.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
dialog.dismiss();
}
});
}
public void setOnOKClickListener(OnOKClickListener okClickListener) {
this.okClickListener = okClickListener;
}
public interface OnOKClickListener {
void onOKClick();
}
}
```