今天尝试开始导入课表，并且学习删除，貌似有些不顺，但是结局是好的，还是可以用呀。
package zzm.org.kebiaojiemian; import android.media.AudioManager; import android.os.Bundle; import android.app.Activity; import android.app.AlertDialog; import android.app.Service; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.SharedPreferences; import android.database.Cursor; import android.util.Log; import android.view.GestureDetector; import android.view.Menu; import android.view.MenuItem; import android.view.MotionEvent; import android.view.View; import android.view.View.OnClickListener; import android.view.View.OnTouchListener; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ListAdapter; import android.widget.ListView; import android.widget.SimpleCursorAdapter; import android.widget.TabHost; import android.widget.TabWidget; import android.widget.TextView; public class MainActivity extends Activity { private static String[] TB_NAME= new String[]{"Mon", "Tue", "Wed", "Thur", "Fri", "Sat", "Sun"}; public ListView list[] = new ListView[7]; private TabHost tabs = null; private TextView exitButton = null; private TextView setButton = null; public static DataBase db; public Cursor[] cursor=new Cursor[7]; public SimpleCursorAdapter adapter; private SharedPreferences pre; //定义手势检测器实例 private GestureDetector detector = null; //定义手势动作两点之间的最小距离 private final int FLIP_DISTANCE = 200; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //将该activity加入到MyApplication对象实例容器中 MyApplication.getInstance().addActivity(this); db=new DataBase(MainActivity.this); pre=getSharedPreferences("firstStart",Context.MODE_PRIVATE); /* * 判断程序是否第一次运行，如果是创建数据库表 */ if(pre.getBoolean("firstStart", true)){ SingleInstance.createTable(); (pre.edit()).putBoolean("firstStart",false).commit(); // finish(); } exitButton = (TextView)findViewById(R.id.exitButton); setButton = (TextView)findViewById(R.id.setButton); list[0] = (ListView)findViewById(R.id.list0); list[1] = (ListView)findViewById(R.id.list1); list[2] = (ListView)findViewById(R.id.list2); list[3] = (ListView)findViewById(R.id.list3); list[4] = (ListView)findViewById(R.id.list4); list[5] = (ListView)findViewById(R.id.list5); list[6] = (ListView)findViewById(R.id.list6); tabs = (TabHost)findViewById(R.id.tabhost); //创建手势检测器 detector = new GestureDetector(this, new DetectorGestureListener()); //在配置任何的TabSpec之前，必须在TabHost上调用该方法 tabs.setup(); //为主界面注册七个选项卡 TabHost.TabSpec spec = null; addCard(spec,"tag1",R.id.list0,"日"); addCard(spec,"tag2",R.id.list1,"一"); addCard(spec,"tag3",R.id.list2,"二"); addCard(spec,"tag4",R.id.list3,"三"); addCard(spec,"tag5",R.id.list4,"四"); addCard(spec,"tag6",R.id.list5,"五"); addCard(spec,"tag7",R.id.list6,"六"); //修改tabHost选项卡中的字体的颜色 TabWidget tabWidget = tabs.getTabWidget(); for(int i=0;i<tabWidget.getChildCount();i++){ TextView tv = (TextView)tabWidget.getChildAt(i).findViewById(android.R.id.title); tv.setTextColor(0xff004499); } //设置打开时默认的选项卡是当天的选项卡 tabs.setCurrentTab(ShareMethod.getWeekDay()); //用适配器为各选项卡添加所要显示的内容 for(int i=0;i<7;i++){ cursor[i]=MainActivity.db.select(i); list[i].setAdapter(adapter(i)); } //声明一个获取系统音频服务的类的对象 final AudioManager audioManager = (AudioManager)getSystemService(Service.AUDIO_SERVICE); //获取手机之前设置好的铃声模式,该数据将用来传递给activity_set final int orgRingerMode = audioManager.getRingerMode(); //为退出按钮绑定监听器 exitButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { //创建AlertDialog.Builder对象，该对象是AlterDialog的创建器，AlterDialog用来创建弹出对话框 final AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this); exit(builder); } }); //为设置按钮绑定监听器 setButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(MainActivity.this, SetActivity.class); //将orgRingerMode数据传给activity_set intent.putExtra("mode_ringer", orgRingerMode); startActivity(intent); } }); for( int day=0;day<7;day++){ //为七个ListView绑定触碰监听器，将其上的触碰事件交给GestureDetector处理 //此监听器是必须的，不然滑动手势只在ListView下的空白区域有效，而在ListView上无效 list[day].setOnTouchListener(new OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { return detector.onTouchEvent(event); } }); //为每个ListView的每个item绑定监听器，点击则弹出由AlertDialog创建的列表对话框进行选择 list[day].setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View arg1, final int id, long arg3) { final int currentDay=tabs.getCurrentTab(); final int n=id; final AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this); builder.setIcon(R.drawable.ic_launcher); builder.setTitle("选择"); TextView tv=(TextView)arg1.findViewById(R.id.ltext0); Log.i("Test",(tv.getText().toString().equals(""))+""); //如果课程栏目为空就启动添加对话框 if((tv.getText()).toString().equals("")){ //通过数组资源为对话框中的列表添加选项内容，这里只有一个选项 builder.setItems(R.array.edit_options1, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { //如果单击了该列表项，则跳转到编辑课程信息的界面 if(which == 0){ new MyDialog(MainActivity.this).add(currentDay,n); } } }); builder.create().show(); } //否则启动修改对话框，或直接删除数据 else{ builder.setItems(R.array.edit_options2, new DialogInterface.OnClickListener() { @SuppressWarnings("deprecation") @Override public void onClick(DialogInterface dialog, int which) { //如果单击了该列表项，则跳转到编辑课程信息的界面 if(which == 0){ new MyDialog(MainActivity.this).modify(currentDay,n); } if(which == 1){ cursor[currentDay].moveToPosition(n); int n1=Integer.parseInt(cursor[currentDay].getString(7));//课程的总节数 int n2=Integer.parseInt(cursor[currentDay].getString(8));//选中的为该课程的第几节 switch(n2){ case 0: for(int m=0;m<n1;m++){ MainActivity.db.deleteData(currentDay,n+m+1); } break; case 1: MainActivity.db.deleteData(currentDay,n); for(int m=1;m<n1;m++){ MainActivity.db.deleteData(currentDay,n+m); } break; case 2: MainActivity.db.deleteData(currentDay,n-1); MainActivity.db.deleteData(currentDay,n); for(int m=2;m<n1;m++){ MainActivity.db.deleteData(currentDay,n+m-1); } break; case 3: for(int m=n2;m>=0;m--){ MainActivity.db.deleteData(currentDay,n-m+1); } break; default: break; } cursor[currentDay].requery(); list[currentDay].invalidate(); } } }); builder.create().show(); } } }); } } //内部类，实现GestureDetector.OnGestureListener接口 class DetectorGestureListener implements GestureDetector.OnGestureListener{ @Override public boolean onDown(MotionEvent e) { return false; } //当用户在触屏上“滑过”时触发此方法 @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { int i = tabs.getCurrentTab(); //第一个触点事件的X坐标值减去第二个触点事件的X坐标值超过FLIP_DISTANCE，也就是手势从右向左滑动 if(e1.getX() - e2.getX() > FLIP_DISTANCE){ if(i<6) tabs.setCurrentTab(i+1); // float currentX = e2.getX(); // list[i].setRight((int) (inialX - currentX)); return true; } //第二个触点事件的X坐标值减去第一个触点事件的X坐标值超过FLIP_DISTANCE，也就是手势从左向右滑动 else if(e2.getX() - e1.getX() > FLIP_DISTANCE){ if(i>0) tabs.setCurrentTab(i-1); return true; } return false; } @Override public void onLongPress(MotionEvent e) { } @Override public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) { return false; } @Override public void onShowPress(MotionEvent e) { } @Override public boolean onSingleTapUp(MotionEvent e) { return false; } } //覆写Activity中的onTouchEvent方法，将该Activity上的触碰事件交给GestureDetector处理 @Override public boolean onTouchEvent(MotionEvent event) { return detector.onTouchEvent(event); } //设置菜单按钮 @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.activity_main, menu); return true; } //当点击菜单中的“退出”键时，弹出提示是否退出的对话框 @Override public boolean onOptionsItemSelected(MenuItem item) { //创建AlertDialog.Builder对象，该对象是AlterDialog的创建器，AlterDialog用来创建弹出对话框 final AlertDialog.Builder builder = new AlertDialog.Builder(this); if(item.getItemId() == R.id.menu_exit){ exit(builder); return true; } if(item.getItemId() == R.id.menu_settings){ Intent intent = new Intent(MainActivity.this, SetActivity.class); startActivity(intent); return true; } return super.onOptionsItemSelected(item); } //子 方法:为主界面添加选项卡 public void addCard(TabHost.TabSpec spec,String tag,int id,String name){ spec = tabs.newTabSpec(tag); spec.setContent(id); spec.setIndicator(name); tabs.addTab(spec); } //子方法：用来弹出是否退出程序的对话框，并执行执行是否退出操作 public void exit(AlertDialog.Builder builder){ //为弹出的对话框设置标题和内容 builder.setIcon(R.drawable.ic_launcher); builder.setTitle("退出程序"); builder.setMessage("确定要退出随身课程表吗？"); //设置左边的按钮为“确定”键，并且其绑定监听器，点击后退出 builder.setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { //退出应用程序，即销毁地所有的activity MyApplication.getInstance().exitApp(); } }); //设置右边的按钮为“取消”键，并且其绑定监听器，点击后仍然停留在当前界面 builder.setNegativeButton("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { } }); //创建并显示弹出的对话框 builder.create().show(); } /* * 为每一个list提供数据适配器 */ @SuppressWarnings("deprecation") public ListAdapter adapter(int i){ return new SimpleCursorAdapter(this, R.layout.list_v2,cursor[i],new String[]{"_id","classes","location", "teacher","zhoushu"},new int[]{R.id.number,R.id.ltext0,R.id.ltext1,R.id.ltext6,R.id.ltext7} ); } /* * 第一次运行时创建数据库表 */ static class SingleInstance{ static SingleInstance si; private SingleInstance(){ for(int i=0;i<7;i++){ db.createTable(i); } } static SingleInstance createTable(){ if(si==null) return si=new SingleInstance(); return null; } } }