我已经阅读了 2 天之前发布的问题和答案，并且尝试了建议的每个变体，并在我的 list 中将我的 launchMode 属性设置为“标准”。
我试图在按下按钮后将数据从我的第二个 Activity 传回我的第一个 Activity 。按下按钮后，第一个 Activity 启动，但它不会返回到我的 onActivityResult() 方法。我不明白为什么会这样。
这是我在 Activity 2 中的代码:
Button btnAdd = (Button) findViewById(R.id.btnAdd);
btnAdd.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
//Check that message is printed out to LogCat
System.out.println("hello test1 Activity2");
EditText band = (EditText) findViewById(R.id.txtBand);
band.setFilters(new InputFilter[] {
new InputFilter.LengthFilter(9)
});
EditText album = (EditText) findViewById(R.id.txtAlbum);
album.setFilters(new InputFilter[] {
new InputFilter.LengthFilter(9)
});
final Spinner genre = (Spinner) findViewById(R.id.spin_genre);
TextView selection = (TextView)genre.getSelectedView();
CharSequence strBand = band.getText();
CharSequence strAlbum = album.getText();
CharSequence strGenre = selection.getText();
//Check that we got input values
System.out.println("hello test Activity2- " +
strBand + " - " + strAlbum + " - " + strGenre);
//**********Intent Declaration************
Intent i = new Intent(getApplicationContext(), Activity1.class);
i.putExtra("strBand", strBand);
i.putExtra("strAlbum", strAlbum);
i.putExtra("strGenre", strGenre);
startActivityForResult(i, 0);
setResult(RESULT_OK, i);
finish();
}
});
这是 Activity 1:
public class Activity1 extends Activity {
/** Called when the activity is first created. */
@SuppressWarnings("deprecation")
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button addAlbum = (Button) findViewById(R.id.btnMain);
addAlbum.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent i = new Intent();
i.setClassName("jorge.jorge.jorge",
"jorge.jorge.jorge.Activity2");
startActivity(i);
}
});
}// end of onCreate()
//******************Callback Method****************************
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
//Checks if we got to ActivityResult
System.out.println("hello test 2: We got to Activity1");
if (resultCode == RESULT_OK)
{
Bundle returndata = data.getExtras();
String strAlbum = returndata.getString("strAlbum");
String strBand = returndata.getString("strBand");
String strGenre = returndata.getString("strGenre");
// check to see if we got the variable values from activity2
System.out.println("hello test 2: We got to Activity1 with variables - "
+ strBand + " - " + strAlbum + " - " + strGenre);
//Create table layout to contains views with variable values
TableLayout table = new TableLayout(this);
table.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
//creates row with parameters
TableRow row = new TableRow(this);
row.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT));
//text views to contain variable values
TextView tv1 = new TextView(this);
tv1.setText(strBand);
row.addView(tv1);
TextView tv2 = new TextView(this);
tv2.setText(strAlbum);
row.addView(tv2);
TextView tv3 = new TextView(this);
tv3.setText(strGenre);
row.addView(tv3);
//adds the table row to the table layout
table.addView(row);
}
}// end onActivityResult()
我不确定我的 Activity 回调是否未正确放置在代码中，或者我是否没有正确触发 Intent ，或者我是否没有使用正确的方法设置回调或其他什么。我知道已经讨论过这个话题，但我没有想法。谢谢。
最佳答案
你刚刚弄反了。如果 Activity1 应该启动 Activity2 并且 Activity2 应该将结果发送回 Activity1，您需要这样做:
在 Activity 1 中:
Intent i = new Intent();
i.setClassName("jorge.jorge.jorge", "jorge.jorge.jorge.Activity2");
startActivityForResult(i); // This starts Activity2 and waits for the result
在 Activity 2 中:
Intent i = new Intent(getApplicationContext(), Activity1.class);
i.putExtra("strBand", strBand);
i.putExtra("strAlbum", strAlbum);
i.putExtra("strGenre", strGenre);
setResult(RESULT_OK, i);
finish(); // This closes Activity2 and generates the callback to Activity.onActivityResult()
关于android - 在 Activity 之间传递数据 - Android SDK，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/10938775/