AndroidWidget实践 --- EverydayTips开发(5)

把从TXT文本中选取任意警句实现了

个人认为挺好懂就不过多解释了

注意我把tips.txt放 assets文件夹了

package com.su.tipeveryday;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import android.content.Context;
import android.content.res.AssetManager;
import android.util.Log;
import android.widget.Toast;

public class Tips {
	static final String DATA_PATH = "/mnt/sdcard/Android/TipEveryDay/";
	public static Boolean flagBoolean = true;
	private static List<String> tips = new ArrayList<String>();

	public static void intiFile(Context context) {
		File path = new File(DATA_PATH);// 建立系統目錄
		if (!path.exists()) {
			path.mkdirs();
		}
		File fileTip = new File(DATA_PATH + "tips.txt");
		if (!fileTip.exists()) {
			Log.i("FFFFFFFfff", "121");
			copyAssets(context);//如果没有TXT文件就从assets中copy

		}

	}

	public static String getTips() {
		File fileTip = new File(DATA_PATH + "tips.txt");
		BufferedReader reader = null;
		if (tips.isEmpty()) {//为了性能考虑 只读取一次txt
			try {
				reader = new BufferedReader(new FileReader(fileTip));
				String tempString = null;
				while ((tempString = reader.readLine()) != null) // 将文件中用户信息存储与数组用于输出
				{
					Log.i(" ", tempString);
					tips.add(tempString);//把所有的句子放到tips中 用的时候取出

				}
				reader.close();
			}

			catch (IOException e) {
				e.printStackTrace();
			}

		}

		int r = (int) (Math.random() * tips.size());// 随机选取一个句　
		return tips.get(r);

	}

	private static void copyAssets(Context context) {//copy Assets的方法

		AssetManager assetManager = context.getAssets();
		String[] files = null;
		try {
			files = assetManager.list("");
		} catch (IOException e) {

		}
		for (int i = 0; i < files.length; i++) {
			InputStream in = null;
			OutputStream out = null;
			try {
				if (!(new File(Tips.DATA_PATH + files[i])).exists()) {
					in = assetManager.open(files[i]);
					out = new FileOutputStream(Tips.DATA_PATH + files[i]);
					Tips.copyFile(in, out);
					in.close();
					in = null;
					out.flush();
					out.close();
					out = null;
				}
			} catch (Exception e) {
			}
		}
	}

	public static void copyFile(InputStream in, OutputStream out)
			throws IOException {
		byte[] buffer = new byte[1024];//做了个缓冲流
		int read;
		while ((read = in.read(buffer)) != -1) {
			out.write(buffer, 0, read);
		}
	}
}

然后我们加上配置刷新时间的操作还有分享按钮基本功能就差不多了

这是最后的Activity

package com.su.tipeveryday; import android.app.Activity; import android.app.AlertDialog; import android.appwidget.AppWidgetManager; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.SharedPreferences; import android.os.Bundle; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Button; import android.widget.EditText; public class TipEveryDayActivity extends Activity { int mAppWidgetId; private EditText editText; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.main); Log.i("myLog", " on WidgetConf ... "); editText = (EditText) findViewById(R.id.editTextTip); Tips.intiFile(TipEveryDayActivity.this); setResult(RESULT_CANCELED); // Find the widget id from the intent. Intent intent = getIntent(); String tip = intent.getStringExtra("TIP");// 获取传来的值 editText.setText(tip); Bundle extras = intent.getExtras(); if (extras != null) { mAppWidgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID); Log.i("TTTTT", mAppWidgetId + "");// 这个返回的屏幕上的widgetID,没增加一个会加一 // 我的模拟器是19,应该是有保留ID? } Intent resultValue = new Intent(); resultValue.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, mAppWidgetId); // 感觉这里的mAppWidgetId // 应该是和控制知道widget有关稍后研究 Button buttonShare = (Button) findViewById(R.id.buttonShare); buttonShare.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(Intent.ACTION_SEND); intent.setType("text/plain"); intent.putExtra(Intent.EXTRA_SUBJECT, "来自桌面警语的分享"); intent.putExtra(Intent.EXTRA_TEXT, editText.getText() .toString()); startActivity(Intent.createChooser(intent, getTitle())); } }); if (tip == null) { setResult(RESULT_OK, resultValue); finish(); } setResult(RESULT_OK, resultValue); } private static final int TOOLBAR0 = 0; private static final int TOOLBAR1 = 1; public boolean onCreateOptionsMenu(Menu menu) { menu.add(0, TOOLBAR0, 1, "刷新时间").setIcon( android.R.drawable.ic_menu_recent_history); menu.add(0, TOOLBAR1, 2, "退出程序").setIcon( android.R.drawable.ic_lock_power_off); return super.onCreateOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case 0: showTimeDialog(); break; case 1: android.os.Process.killProcess(android.os.Process.myPid()); break; } return super.onOptionsItemSelected(item); } protected void showTimeDialog() { final EditText et = new EditText(TipEveryDayActivity.this); AlertDialog.Builder ad1 = new AlertDialog.Builder( TipEveryDayActivity.this); ad1.setTitle("刷新时间:"); ad1.setIcon(android.R.drawable.ic_dialog_info); ad1.setView(et); ad1.setPositiveButton("是", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int i) { startService(new Intent(TipEveryDayActivity.this, TipService.class)); SharedPreferences settings = TipEveryDayActivity.this .getSharedPreferences("time", Context.MODE_PRIVATE); SharedPreferences.Editor editor = settings.edit(); editor.putString("time", et.getText().toString()); editor.commit(); } }); ad1.setNegativeButton("否", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int i) { } }); ad1.show();// 显示对话框 } }

posted @ 2012-05-25 19:00 sfshine 阅读(149) 评论(0) 收藏举报

刷新页面返回顶部

sfshine

AndroidWidget实践 --- EverydayTips开发(5)

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