Question

我想解析从一个意图到另一个意图的数据列表

但是，用我的代码，我只设法传递listview中的第一项。我使用log.d来检查项目，并意识到只有一个项目正在通过。在我的listview中有2个项目，当我将它传递给我的下一个意图时，日志中只显示了一个项目..

我在课堂上做了一个序列化。我记录了我的总结，然而，当我点击摘要时，显示的日志并非所有数据。

logcat的：

01-28 18:20:49.218: D/Bundle(20278): bundle : Bundle[{clickedpreOdometer=, clickedID=2, clickedCost= 12.0, clickedDate=27/12/2014, pojoArrayList=[com.example.fuellogproject.fuelLogPojo@43bf3f18, com.example.fuellogproject.fuelLogPojo@43bf5b68], clickedPump=3, clickedPrice=4, clickedFCon= 0.0, clickedOdometer=3}]

列表视图

    public void summaryClick (View v)
{
    Intent sum = new Intent(this, summary.class);
    fuelLogPojo clickedObject = pojoArrayList.get(0);
    Bundle dataBundle = new Bundle();
    dataBundle.putString("clickedID", clickedObject.getid());
    dataBundle.putString("clickedDate", clickedObject.getdate());
    dataBundle.putString("clickedPrice", clickedObject.getprice());
    dataBundle.putString("clickedPump", clickedObject.getpump());
    dataBundle.putString("clickedCost", clickedObject.getcost());
    dataBundle.putString("clickedOdometer", clickedObject.getodometer());
    dataBundle.putString("clickedpreOdometer",
            clickedObject.getpreodometer());
    dataBundle.putString("clickedFCon", clickedObject.getfcon());
    dataBundle.putSerializable("pojoArrayList", pojoArrayList);

    Log.i("FuelLog", "dataBundle " + dataBundle);
    // Attach the bundled data to the intent
//  sum.putExtras(dataBundle);
    sum.putExtras(dataBundle);
    Log.i("Exrrass", "dataBundle " + dataBundle);
    // Start the Activity
    startActivity(sum);


}

summary.java

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.summary);
        //month = (TextView)findViewById(R.id.month);
        avgPrice = (TextView)findViewById(R.id.showavfPriceTV);
        exFuel = (TextView)findViewById(R.id.showexFuelTV);
        avgFC = (TextView)findViewById(R.id.showavgFCTV);
        doneButton = (Button)findViewById(R.id.doneBTN);
        exitButton = (Button)findViewById(R.id.exitBTN);

        Bundle takeBundledData = getIntent().getExtras();  
        // First we need to get the bundle data that pass from the UndergraduateListActivity

        bundleID = takeBundledData.getString("clickedID");
        /*bundleDate = takeBundledData.getString("clickedDate");
        bundlePrice = takeBundledData.getString("clickedPrice");
        bundlePump = takeBundledData.getString("clickedPump");
        bundleCost = takeBundledData.getString("clickedCost");
        bundleOdometer = takeBundledData.getString("clickedOdometer");
        bundlePreOdometer = takeBundledData.getString("clickedpreOdometer");
        bundleFcon = takeBundledData.getString("clickedFCon");*/
        Log.d("Bundle","bundle : "+ takeBundledData);


}

fuelLogpojo.java

public class fuelLogPojo implements Serializable{

Answer 1

fuelLogPojo应实施Parcelable或Serializable

Bundles可以接受自定义类，如果它们实现Parcelable或Serializable，Parcelable更快但实施起来更多，Serializable更容易实现，但速度更慢

我想在这个例子中fuelLogPojo extends Serializable，只是因为它更容易设置，但你应该考虑Parcelable

然后你可以这样做：

dataBundle.putSerializable("pojoArrayList", pojoArrayList);
sum.setArguments(bundle);

Also, you should reconsider the naming convention for your classes.

编辑：以下是如何在摘要中访问pojoArrayList。

List<fuelLogPojo> pojoArrayList = (List<fuelLogPojo>)extras.getSerializable("pojoArrayList");

Answer 2

如果要传递自定义对象数组，则必须实现Parcerable接口

看看here

然后传递数组

Intent i=...
i.putParcelableArrayListExtra("ARRAY", array);

并阅读

getIntent().getParcelableArrayListExtra("ARRAY")

Answer 3

获取文本框的值并将其存储到某些变量ex，val1和val2，然后使用

  Intent intent = new Intent(getBaseContext(), SecondActivity.class);
  intent.putExtra("Textbox_val1", val1);
  intent.putExtra("Textbox_val2", val2);
  startActivity(intent);

在第二个活动中写

   Bundle extras = getIntent().getExtras(); 
   if(extras !=null) {
   String value1 = extras.getString(Textbox_val1);
   String value2 = extras.getString(Textbox_val2);
   }

使用serializable将数据列表从一个intent传递到另一个intent

3 个答案: