Question

以下是我的活动。我点击两个不同的按钮通过Intent调用此活动。现在我想要的是当我打开下面的活动点击第一个按钮然后我想在edittext中显示提示＆＃34; Po没有新的＆＃34;当我点击第二个按钮打开下面的活动时，我想在edittext＆＃34; Po No old＆＃34;中显示提示。我怎么能解决这个问题？

Xml文件 -

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#ffffff" >

            <LinearLayout
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_margin="5dp"
                android:layout_weight="1"
                android:orientation="vertical">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="12dp"
                    android:text="Po no."
                    android:textColor="@color/textColor"
                    android:textSize="13sp"
                    android:textStyle="bold" />

                <EditText
                    android:id="@+id/txtPoNo"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:completionThreshold="3"
                    android:imeOptions="actionDone"
                    android:inputType="number"
                    android:nextFocusDown="@+id/txtMeterSrMo"
                    android:singleLine="true"
                    android:textSize="14sp" />

             </LinearLayout>
</ScrollLayout>

活动文件 -

public class InstallationDashBoardActivity extends AppCompatActivity {

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

        txtPoNo = (EditText) findViewById(R.id.txtPoNo);

    }
}

按钮单击 -

installation.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub

            Intent intent = new Intent(ServiceCategories.this,InstallationDashBoardActivity.class);
            intent.putExtra("isNew", true);
            startActivity(intent);


        }
    });

replacement.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            Intent intent = new Intent(ServiceCategories.this,InstallationDashBoardActivity.class);
            intent.putExtra("isNew", false);
            startActivity(intent);
        }
    });

我将代码放在我的片段onCreateView -

中

//Getting Extras
        if(getActivity().getIntent().getExtras()!=null){
            isNew = getActivity().getIntent().getExtras().getBoolean("isNew");
        }

        // Added condition here
        if(isNew) {
            txtPoNo.setHint("Po No New");
        }
        else {
            txtPoNo.setHint("Po No Old");
        }

Answer 1

致电

txtPoNo.setHint("Po No Old");

<强>更新

你的意思是你想要检测点击了哪个按钮，并根据你要显示正确的提示？对于那个非常简单的传递一个带有intent的布尔标志，并尝试使用该布尔值

进行识别

installation.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub

                Intent intent = new Intent(ServiceCategories.this,InstallationDashBoardActivity.class);

                //Added flag here
                intent.putExtras("isNew", true);
                startActivity(intent);


            }
        });

replacement.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {
                Intent intent = new Intent(ServiceCategories.this,InstallationDashBoardActivity.class);

                //Added flag here
                intent.putExtras("isNew", false);
                startActivity(intent);
            }
        });

在您的活动中获取布尔值

public class InstallationDashBoardActivity extends AppCompatActivity {

//boolean added
public boolean isNew;
    @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.categories_activity);

            //Getting Extras
            if(getIntent().getExtras()!=null){
               isNew = getIntent().getExtras().getBoolean("isNew");
             }

            txtPoNo = (EditText) findViewById(R.id.txtPoNo);

            // Added condition here
            if(isNew)
              txtPoNo.setHint("Po No New");
            else
               txtPoNo.setHint("Po No Old");

        }
    }

Answer 2

@ Moin Khan尝试这个，希望这可以帮到你

installation.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            Intent intent = new Intent(ServiceCategories.this, InstallationDashBoardActivity.class);
            intent.putExtra("key", "value");
            startActivity(intent);
        }
    });

    replacement.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            Intent intent = new Intent(ServiceCategories.this, InstallationDashBoardActivity.class);
            startActivity(intent);
        }
    });

和第二项活动

 Intent intent2 = getIntent();
    String strKey = intent2.getStringExtra("key");
    if (strKey.equalsIgnoreCase("value")) {
        txtPoNo.setHint("Po No New");
    } else {
        txtPoNo.setHint("Po No Old");
    }

Answer 3

  editText.setOnTouchListener(new OnTouchListener() {

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            editText.setHint("");
            return false;
        }

    });

    editText.setOnFocusChangeListener(new OnFocusChangeListener() {

        @Override
        public void onFocusChange(View v, boolean hasFocus) {
            if (!hasFocus){
                editText.setHint("Hint");
            }
        }
    });

如何动态设置EditText提示？

3 个答案: