Android:startActivityForResult &视图类和活动类的 setResult [英] Android: startActivityForResult & setResult for a view class and an activity class
问题描述
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.
I am confused and have no idea on how to use the startActivityResults and setResults to get data from previous activity. I have a view class and a activity class.
基本上在我的视图类中，我有这个对话框，它实际上会启动名为 colorActivity 类的活动类.当用户选择是时，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 方法将值从活动传递回视图时遇到问题.补充一下，之后如何使用获取到的数据?
Basically in my view class i have this dialog and it will actually start the activity class called the colorActivity class. When user selects yes also it will pass the name of the selected circle to the colorActivity class. At the colorActivity class, users are allowed to enter color code for a particular circle and i would like to pass the color code back to the view class. I have problems passing values from activity back to view using the startActivityForResult and setResult method. Adding on, how to make use of the fetched data afterthat?
我的代码如下
来自我的视图类的 Ontouchevent 代码:
Ontouchevent code from my view class:
@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
});
}
推荐答案
在更正其他代码以便您可以运行程序之后，您可以通过这种方式从您的活动 colorActivity 取回参数:
After correcting the other code so that you can run the program, you can retrieve parameters back from your activity colorActivity in this way:
Intent resultIntent = new Intent();
resultIntent.putExtra("NAME OF THE PARAMETER", valueOfParameter);
...
setResult(Activity.RESULT_OK, resultIntent);
finish();
第 2 步:从主要活动中收集数据
覆盖@onActivityResult(...).
@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) {
String value = (String) data.getExtras().getString("NAME OF THE PARAMETER");
参考资料
- http://developer.android.com/training/basics/intents/结果.html
- 如何在 Android 上管理`startActivityForResult`?
- http://steveliles.github.io/returning_a_result_from_an_android_activity.html
这篇关于Android:startActivityForResult &视图类和活动类的 setResult的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
