Question

我在两个String之间发送Activities。这是我发送字符串class的代码。

 public class SetData extends Activity implements OnClickListener{

EditText et;
Button bConfirm;
TextView tv;
String bread;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.data_input);
    initiate();
    bConfirm.setOnClickListener(this);
}

private void initiate() {
    // TODO Auto-generated method stub
    et = (EditText) findViewById(R.id.ET);
    bConfirm = (Button) findViewById(R.id.button1);
    tv = (TextView) findViewById(R.id.TV);
}

@Override
public void onClick(View v) {
    // TODO Auto-generated method stub
    bread = et.getText().toString();
    Bundle basket = new Bundle();
    basket.getString("key", bread);
    Intent stringSend = new Intent(SetData.this, PrintData.class);
    stringSend.putExtras(basket);
    startActivity(stringSend);
} }

此活动按预期启动另一项活动。另一项活动是班级：

public class PrintData extends Activity implements OnClickListener{

EditText tv;
RadioGroup RG;
Button print;
String newstring = "No content received.";
Bundle gotBasket;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.data_output);
    initiate();
    Intent oldintent = getIntent();
    gotBasket = oldintent.getExtras();
    newstring = gotBasket.getString("key");
    tv.setText(newstring);
    //print.setOnClickListener(this);
}

private void initiate() {
    // TODO Auto-generated method stub
    tv = (EditText) findViewById(R.id.TV);
    print = (Button) findViewById(R.id.print);
    RG = (RadioGroup) findViewById(R.id.radioGroup);
}

@Override
public void onClick(View v) {
    // TODO Auto-generated method stub

} }

String newstring的默认值是“No content received。”。当新活动打开时，它会显示上述文本。这意味着字符串由Activity1（SetData）发送，但不由Activity2（PrintData）接收。

这可能是什么原因？我该如何纠正？

Answer 1

您应该在第一项活动中basket.putString()，而不是getString()

Answer 2

在您开展的第一项活动basket.getString("key", bread); 要使用捆绑包发送数据，您应该使用basket.putString("key", bread);

Answer 3

在你的第一个活动中，你在做basket.putString（“key”，bread）;

@Override
public void onClick(View v) {
    // TODO Auto-generated method stub
    bread = et.getText().toString();
    Bundle basket = new Bundle();
    basket.putString("key", bread);
    Intent stringSend = new Intent(SetData.this, PrintData.class);
    stringSend.putExtras(basket);
    startActivity(stringSend);
}

或第一项活动：

stringSend.putExtra("key", bread)

Secend Activity：获取值

newstring=getIntent().getExtras().getString("key");

在活动之间传递字符串未收到字符串

3 个答案: