Question

我已经完成了以下编码，用于从数据库中检索数据，并希望在“编辑文本”视图中显示另一个活动。以下代码用于获取数据..

   String fetch_data(int id) {
    SQLiteDatabase sq = this.getReadableDatabase();

    String q = "SELECT "+TAB_NAME+" FROM "+TABLE_NAME+" WHERE "+TAB_ID+" = "+id;

    Cursor c = sq.rawQuery(q, null);

    String s = "";
    c.moveToFirst();
    if (c.moveToFirst()) {
        s = c.getString(c.getColumnIndex(TAB_NAME+""));
    }

    return s;

}

以下代码用于显示此活动中的数据..

t1 = (EditText) findViewById(R.id.editText);

    final MyDBFunction obj = new MyDBFunction(getApplicationContext());
    int req_pos = getIntent().getIntExtra("MyKEY",999);
    t1.setText(obj.fetch_data(req_pos+1));
    t1.setSelection(t1.getText().length());

此代码来自我试图获取数据的活动..

l = (ListView)findViewById(R.id.listView);


    MyDBFunction mf = new MyDBFunction(getApplicationContext());

    final String[] data = mf.broadData();

    l.setAdapter(new ArrayAdapter(getApplicationContext(),R.layout.lvlayout,R.id.text1,data));

    l.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            Toast.makeText(getApplicationContext(),"Clicked On "+data[position],Toast.LENGTH_SHORT).show();
        Intent i = new Intent(getApplicationContext(),ShowInfo.class);
            i.putExtra("MyKEY",position);
            startActivity(i);
        }
    });

但我无法获得数据在哪里？

Answer 1

您的SQLite数据库存储在哪里？可能它是在第一个活动的私人存储中？

也许你可以看看： https://developer.android.com/guide/topics/data/data-storage.html

android - 如何通过SQLite DataBase表中的查询将数据从一个活动显示到另一个活动？ - Stack Overflow

1 个答案: