Android随笔记（持续更新）

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

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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();}}

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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

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();    }}

监听屏幕旋转状态

/** * 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();}}