Question

我有两个按钮，它们都有条形码扫描。一旦它从扫描返回，我想知道用户点击了哪个按钮，这样我可以采取不同的路径＆＃34; onActivityResult＆＃34;方法。我怎么做？

我可以找出在onClick（）方法中点击了哪个按钮但是没有帮助。

public class ReaderActivity extends AppCompatActivity {
    private Button scan_btn, verifyButton;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_reader);
        scan_btn = (Button) findViewById(R.id.scan_btn);
        verifyButton = (Button) findViewById(R.id.buttonVerify);
        final Activity activity = this;
        scan_btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                IntentIntegrator integrator = new IntentIntegrator(activity);
                integrator.setDesiredBarcodeFormats(IntentIntegrator.ALL_CODE_TYPES);
                integrator.setPrompt("Scan");
                integrator.setCameraId(0);
                integrator.setBeepEnabled(false);
                integrator.setBarcodeImageEnabled(false);
                integrator.initiateScan();
            }
        });

        verifyButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                IntentIntegrator integrator = new IntentIntegrator(activity);
                integrator.setDesiredBarcodeFormats(IntentIntegrator.ALL_CODE_TYPES);
                integrator.setPrompt("LINE UP BARCODE WITH SCANNER");
                integrator.setCameraId(0);
                integrator.setBeepEnabled(false);
                integrator.setBarcodeImageEnabled(false);
                integrator.initiateScan();

            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
        if(result != null){
            if(result.getContents()==null){
                Toast.makeText(this, "You cancelled the scanning", Toast.LENGTH_LONG).show();
            }
            else {
                Toast.makeText(this, result.getContents(),Toast.LENGTH_LONG).show();

            }
        }
        else {
            super.onActivityResult(requestCode, resultCode, data);
        }
    }
}

Answer 1

您可以在活动中添加布尔值

例如：

private boolean isScanButtonClicked;

使用以下代码

 scan_btn.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    isScanButtonClicked = true; // true a scan button clicked
                    IntentIntegrator integrator = new IntentIntegrator(activity);
                    integrator.setDesiredBarcodeFormats(IntentIntegrator.ALL_CODE_TYPES);
                    integrator.setPrompt("Scan");
                    integrator.setCameraId(0);
                    integrator.setBeepEnabled(false);
                    integrator.setBarcodeImageEnabled(false);
                    integrator.initiateScan();
                }
            });


    verifyButton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    isScanButtonClicked = false; // false as scan button not clicked
                    IntentIntegrator integrator = new IntentIntegrator(activity);
                    integrator.setDesiredBarcodeFormats(IntentIntegrator.ALL_CODE_TYPES);
                    integrator.setPrompt("LINE UP BARCODE WITH SCANNER");
                    integrator.setCameraId(0);
                    integrator.setBeepEnabled(false);
                    integrator.setBarcodeImageEnabled(false);
                    integrator.initiateScan();

                }

根据 isScanButtonClicked 值，您可以在onActivityResult（）中执行操作

希望这些可以帮助你。

Answer 2

您可以向 Intent data 添加一些标记/数据并将此数据处理为 onActivityResult ，以便在您的操作中点击该按钮，或更改 resultCode 以正确的方式处理此结果。

Answer 3

public class MainActivity extends AppCompatActivity {

    public Button btnOne;
    public Button btnTwo;
    public String btnClicked;

    public static int VALUEONE = 1;
    public static int VALUETWO = 2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        btnUm = (Button)findViewById(R.id.btnUm);
        btnDois = (Button)findViewById(R.id.btnDois);

        btnOne.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
               Intent test = new Intent(MainActivity.this, NextActivity.class);
                btnClicked = "btnOne";
                startActivityForResult(test,VALUEONE);
            }
        });

       btnTwo.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
               Intent test = new Intent(MainActivity.this, NextActivity.class);
                btnClicked = "btnTwo";
                startActivityForResult(test,VALUETWO);
            }
        });
    }


    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
       System.out.println("Btn clicked: " + btnClicked);
  }

...........

我在Android Studio中尝试使用此代码并且可以正常运行。你做了类似的事情吗？

Answer 4

通过get set方法解决它

创建了如下所示的类

public class myApplication extends Application{

    private String someVariable;

    public String getWhichButton() {
        return someVariable;
    }

    public void setWhichButton(String someVariable) {
        this.someVariable = someVariable;
    }
}

请务必在AndroidManifest的android:name=".myApplication"标记中添加<Application>。然后在按钮点击操作期间的ReaderActivity中，我设置了

((myApplication) activity.getApplication()).setWhichButton("scan");

OR

((myApplication) activity.getApplication()).setWhichButton("Verify");

取决于我点击的按钮。在onActivityResult方法中我使用

((myApplication) this.getApplication()).getWhichButton();

检索单击哪个按钮以相应地执行操作。

public class ReaderActivity extends AppCompatActivity{

    private Button scan_btn, verifyButton;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_reader);
        scan_btn = (Button) findViewById(R.id.scan_btn);
        verifyButton = (Button) findViewById(R.id.buttonVerify);
        final Activity activity = this;
        scan_btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ((myApplication) activity.getApplication()).setWhichButton("scan");

                IntentIntegrator integrator = new IntentIntegrator(activity);
                integrator.setDesiredBarcodeFormats(IntentIntegrator.ALL_CODE_TYPES);
                integrator.setPrompt("Scan");
                integrator.setCameraId(0);
                integrator.setBeepEnabled(true);
                integrator.setBarcodeImageEnabled(false);
                integrator.initiateScan();

            }
        });

        verifyButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ((myApplication) activity.getApplication()).setWhichButton("verify");
                IntentIntegrator integrator = new IntentIntegrator(activity);
                integrator.setDesiredBarcodeFormats(IntentIntegrator.ALL_CODE_TYPES);
                integrator.setPrompt("LINE UP BARCODE WITH SCANNER");
                integrator.setCameraId(0);
                integrator.setBeepEnabled(true);
                integrator.setBarcodeImageEnabled(false);
                integrator.initiateScan();

            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);


        if(result != null){
            if(result.getContents()==null){
                Toast.makeText(this, "You cancelled the scanning", Toast.LENGTH_LONG).show();
            }
            else {
                Toast.makeText(this, result.getContents(),Toast.LENGTH_LONG).show();

                String val = ((myApplication) this.getApplication()).getWhichButton();
                if(val=="scan") {
                    Toast.makeText(this, "Scan button pressed", Toast.LENGTH_LONG).show();
                }
                else
                    Toast.makeText(this, "Verify button pressed", Toast.LENGTH_LONG).show();
            }
        }
        else {
            super.onActivityResult(requestCode, resultCode, data);
        }
    }
}

Android：如何知道内部点击了哪个按钮＆＃34; onActivityResult＆＃34;方法

4 个答案: