将数据从一个活动传递到另一个活动列表视图

Question

我想将数据从一个活动传递到另一个活动列表视图..在这里我有，第一个活动列表视图第二个活动-一些编辑文本框（当我单击第一个活动列表视图时，从数据库中获取与 id 相关的详细信息并在第二个活动中的edittextboxes）ThirdActivity-one listview（当我单击第二个活动中的按钮时，我只想将当前数据移动到ThirdActivity Listview）。这里我的问题是 firstactivity listview 中的所有数据也显示在第三个活动中..谁能帮我解决这个问题...我是 android 新手..

第二个活动：

 protected void onStart() {
            // TODO Auto-generated method stub
            super.onStart();
            accountId = this.getIntent().getStringExtra("accountid");
            Log.v("one",accountId);
            db=new databaseone(getApplicationContext());
            Cursor cur=null;
            cur=db.viewdata(accountId);

            // cur = db.query(db.TABLE_NAME, null,
                //" id = ?", new String[] { accountId }, null, null, null);
            //startManagingCursor(accounts);
            if (cur.moveToFirst()) {

                // update view
                cheqgiven.setText(cur.getString(cur
                        .getColumnIndex("cheqgiven")));
                cheqamt.setText(cur.getString(cur
                        .getColumnIndex("cheqamt")));
                cheqdate.setText(cur.getString(cur
                        .getColumnIndex("cheqdate")));
                cheqno.setText(cur.getString(cur
                        .getColumnIndex("cheqno")));
                remarks.setText(cur.getString(cur
                        .getColumnIndex("remarks")));
                }
                //while(cur.moveToNext());{
            cur.close();    
            db.close();
            }
    public void returned(View v){

            Intent intent = new Intent(getApplicationContext(), Returned.class);

            intent.putExtra("in", accountId);

            startActivity(intent);
        }

第三个活动：

    public class Returned extends Activity {
        String chequeid;
        ListView lv;
        ArrayList<Map<String, String>> lv2; 
        databaseone db;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.returned);
            lv=(ListView) this.findViewById(R.id.listCheque2);
            lv2 = new ArrayList<Map<String, String>>();
        }
        @Override
        protected void onStart() {
            // TODO Auto-generated method stub
            super.onStart();
            chequeid = this.getIntent().getStringExtra("in");
            lv2.removeAll(lv2);
            db=new databaseone(getApplicationContext());
            Cursor c=null;

            //array=new ArrayList<String>();
            c=db.viewdata(chequeid);
            while (c.moveToNext()) {
                LinkedHashMap<String, String> tran = new LinkedHashMap<String, String>();
                String n=c.getString(c.getColumnIndex("id"));
                String p=c.getString(c.getColumnIndex("cheqgiven"));
                String a=c.getString(c.getColumnIndex("cheqamt"));
                tran.put("id", n);
                tran.put("cheqgiven", p);
                tran.put("cheqamt", a);
                lv2.add(tran);
            }

            c.close();
            db.close();

            SimpleAdapter adapter = new SimpleAdapter(this, lv2,
                    R.layout.chequelist, new String[] { "id",
                            "cheqgiven","cheqamt" }, new int[] { R.id.textAccNo, R.id.textName,R.id.textTransType});

            lv.setAdapter(adapter);

        }

数据库：

    public Cursor viewdata(String acct) {
            // TODO Auto-generated method stub
            sdb = this.getReadableDatabase();
            String where = (acct == null) ? "" : " where id = " + acct;
            Cursor c=sdb.rawQuery("select * from " + TABLE_NAME + where, null);
            return c;

        }

第一个活动：

public class PendingForPayment extends Activity {
    //ListView lv;
    String accountId;
    ListView lv;
    //TextView tv;
    //String tv1;
    //String cheqgiven1,amount1;
    //ArrayList<String> array;
    ArrayList<Map<String, String>> lv2; 
    databaseone db;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.pending_for_payment);
        //accNo= this.getIntent().getStringExtra("accnum");
        //Name= this.getIntent().getStringExtra("name");
        //tv=(TextView)findViewById(R.id.textAccNo);
        lv=(ListView) this.findViewById(R.id.listCheque);

        lv2 = new ArrayList<Map<String, String>>();
        lv.setOnItemClickListener( new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View selectedView, int arg2,long arg3) {
                TextView  textAccountId = (TextView) selectedView.findViewById(R.id.textAccNo);
                //Log.d("Accounts", "Selected Account Id : " + textAccountId.getText().toString());
                Intent intent = new Intent(getApplicationContext(), Marking.class);
                //tv1=tv.getText().toString();
                intent.putExtra("accountid", lv2 .get(arg2).get("id"));
                //intent.putExtra("accountid", textAccountId.getText().toString());
                //Log.v("1", "entered");
                //intent.putExtra("accountid",textAccountId);
                startActivity(intent);
            }
        });
    }

    @Override
    protected void onStart() {
        // TODO Auto-generated method stub
        super.onStart();

        lv2.removeAll(lv2);
        db=new databaseone(getApplicationContext());
        Cursor c=null;


        c=db.viewdata(accountId);


    while (c.moveToNext()) {
            LinkedHashMap<String, String> tran = new LinkedHashMap<String, String>();
            String n=c.getString(c.getColumnIndex("id"));
            String p=c.getString(c.getColumnIndex("cheqgiven"));
            String a=c.getString(c.getColumnIndex("cheqamt"));
            tran.put("id", n);
            tran.put("cheqgiven", p);
            tran.put("cheqamt", a);
            lv2.add(tran);
        }

        c.close();
        db.close();

        SimpleAdapter adapter = new SimpleAdapter(this, lv2,
                R.layout.chequelist, new String[] { "id",
                        "cheqgiven","cheqamt" }, new int[] { R.id.textAccNo, R.id.textName,R.id.textTransType});

        lv.setAdapter(adapter);
    } }

Answer 1

我只会使用发送的 Bundle 类来检索传递的数据。请记住，用于原始类型（字符串、布尔值、int、double、float 等）值是合法的。例如，如果你想传递对象，你可以使用持久对象。请查看以下链接以供进一步参考：http://developer.android.com/guide/faq/framework.html#3

在您的示例中，您可以使用以下代码检索捆绑的值： //发送活动：

Bundle bundle = new Bundle();
bundle.putString("bla", "this string will be send");
Intent myIntent = new Intent(this, Returned.class);
myIntent.putExtras(bundle);
startActivity(myIntent);

//在接收活动中：

Bundle bundle = this.getIntent().getExtras();  
String stringSend = bundle.getString("bla");

Answer 2

使用处理所有必要数据变量的类，然后为所有 get/set 方法制作。而是使用 putExtra（不推荐）只需设置您的值，然后在第二个活动中使用 get。