Android:startActivityForResult& setResult用于视图类和活动类

时间:2014-03-21 08:27:47

标签: android android-intent view android-activity

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的颜色代码,我想将颜色代码传递回视图类。我使用startActivityForResult和setResult方法将值从活动传递回视图时出现问题。添加,如何利用获取的数据?

我的代码如下

从我的视图类中修改代码:

            @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colorActivity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

        });
        }

3 个答案:

答案 0 :(得分:41)

更正其他代码以便您可以运行该程序后,您可以通过以下方式从活动colorActivity中检索参数:

步骤1:从colorActivity

返回一些值
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

答案 1 :(得分:0)

尝试使用

ActivityName.this.startActivityForResult(intent,int)

哦,还有一件小事,在您使用的代码中

startActivityForResults(intent,int)..使用

替换它

startActivityForResult(意向,INT)

答案 2 :(得分:0)

STARTACTIVITYFORRESULT 现已弃用

替代它和推荐的解决方案是使用 Activity Result API

您可以使用以 Kotlin 语言编写的此代码:

  1. 创建 ResultLauncher:

    const someArray = [
      [10, 11],
      [20, 21],
      [30, 31]
    ];
    
    for (const value of someArray) {
      console.log(value);
      console.log(...value);
    }
  2. 使用上述结果启动器启动 Activity:

     private var resultLauncher =
     registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
         if (result.resultCode == Activity.RESULT_OK) {
             val data: Intent? = result.data
             if (null != data && data.getBooleanExtra("REFRESH_PAGE", false)) {
                 //do your code here
             }
         }
     }
    
  3. val intent = Intent(this, XYZActivity::class.java) resultLauncher.launch(intent) 返回结果

    XYZActivity