Question

我的代码有问题我想在用户点击时发送数据并在另一个活动中接收数据例子

我想发送项目的位置，然后我去第二项活动

我想显示位置=描述字段

的表格表格

我的代码

 lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Intent i = new Intent(getApplicationContext(),Details.class);
                i.putExtra("id",position);
                startActivity(i);
          }
        });

  protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_details);
            TextView t1=(TextView)findViewById(R.id.t1);
            ImageButton im=(ImageButton)findViewById(R.id.im);
            Intent data=getIntent();
            String des=data.getStringExtra("id");
           // myDbHelper.openDataBase();
            Cursor curser= DBAdapter.myDataBase.rawQuery("SELECT * FROM sweet where id = '" + des + "'", null);
            curser.moveToPosition(0);
            while (!curser.isAfterLast()) {
                t1.append(curser.getColumnIndex(0));
                curser.close();
            }

第二项活动

        Intent data=getIntent();
        int des=data.getIntExtra("id", 1);
        //String s= String.valueOf(des);
        //
        // Cursor sq= myDbHelper.myDataBase.rawQuery("select * from sweet where description = '"+des+"')",null);
        try {
            //String query = "SELECT * FROM sweet WHERE " + des + " = name";
            String query = "SELECT * FROM sweet WHERE " + des + " = name";
            SQLiteDatabase database = myDbHelper.getReadableDatabase();
           //Cursor sq = myDbHelper.myDataBase.rawQuery("select * from sweet", null);
           Cursor cursor = database.rawQuery(query, null);
           cursor.moveToFirst();
            String description = cursor.getString(2);
            t1.setText(description);
        }

tabele

我的表

ID 名称描述这是3场

Answer 1

 Intent data=getIntent();
 int des=data.getIntExtra("id", 1);

  try {
        SQLite database=myDBHelper.getWritableDatabase();
        Cursor cursor = database.rawQuery(SELECT * FROM sweet WHERE desccription =? ",  new String[]{String.valueOf(des)}, null);

  Details details=new Details();

   if(cursor !=null)
  {
     while(cursor.moveToNext())
  {
     String description = cursor.getString(cursor.getColumnIndexOrThrow(myDbHelper.Description));
     details.setDescription(description);
      t1.setText(description);
  }
}

详情

public class Info {

    private int id;
    private String name;
    private String description;


    public void setID(int id)
    {
        this.id=id;
    }

    public int getID()
    {
        return this.id;
    }  

public String setName(String name)
    {
        this.name=name;
    }

    public String getName()
    {
        return this.name;
    }  


public String setDescription(String description)
    {
        this.description=description;
    }

    public String getDescription()
    {
        return this.description;
    }

以sqllite的活动之间发送数据

1 个答案: