java - 在 Activity 之间传递字符串时未收到字符串

Question

我正在两个Activity之间发送一个String。这是我发送字符串的 class 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 Activity 正在按预期启动另一项 Activity 。另一个 Activity 是类(class):

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

} }

字符串 newstring 的默认值为“未收到内容。”。当新的 Activity 打开时，它会显示上面的文本。这意味着该字符串是由 Activity1 (SetData) 发送的，但不是由 Activity2 (PrintData) 接收的。

这可能是什么原因？我该如何纠正它？

Answer 1

您应该在第一个 Activity 中执行 basket.putString()，而不是 getString()