我很困惑，不知道如何使用 startActivityResults 和 setResults 从以前的活动中获取数据。我有一个视图类和一个活动类。
基本上在我的视图类中，我有这个对话框，它实际上会启动称为 colorActivity 类的活动类。当用户选择 yes 时，它也会将所选圆圈的名称传递给 colorActivity 类。在 colorActivity 类中，允许用户输入特定圆圈的颜色代码，我想将颜色代码传递回视图类。我在使用 startActivityForResult 和 setResult 方法将值从活动传回视图时遇到问题。另外，获取到的数据之后如何使用呢？
我的代码如下
我的视图类中的 Ontouchevent 代码：
@Override
public boolean onTouchEvent(MotionEvent event) {
x = event.getX();
y = event.getY();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
for (int i = 0; i < circles.size(); i++) {
if (circles.get(i).contains(x, y)) {
circleID = i;
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
AlertDialog.Builder builder = new Builder(
getContext());
final EditText text = new EditText(getContext());
builder.setTitle("Adding colors to circles").setMessage(
"Proceed to Enter color");
builder.setPositiveButton("Yes",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface di,
int i) {
Intent intent = new Intent(
getContext(),
colorActivity.class);
intent.putExtra("circlename", circleNameList.get(circleID));
startActivityForResults(intent, 1); // error incurred here : The method startActivityForResult(Intent, int) is undefined for the type new DialogInterface.OnClickListener(){}
}
});
builder.setNegativeButton("No",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface di,
int i) {
}
});
builder.create().show();
}
}, 3000);
break;
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 1) { // Please, use a final int instead of hardcoded
// int value
if (resultCode == RESULT_OK) {
ccode = (String) data.getExtras().getString("colorcode");
}
}
}
public static String getColorCode() {
return ccode;
}
在颜色活动中：
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.add_ecolor);
circlenametextview = (TextView)findViewById(R.id.circlenametextview);
String circlename = super.getIntent().getStringExtra("circlename");
circlenametextview.setText(circlename);//get the circle name
savebutton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
Intent intent = new Intent(colorActivity.this, ?????);//how to return back to the view class?
colorcode = colorEditText.getText().toString();// I am able to get value right up till this point
Intent resultIntent = new Intent();
resultIntent.putExtra("colorcode", colorcode );
setResult(Activity.RESULT_OK, resultIntent);
finish();
}// onclick
});
}
