android - 如何动态设置 EditText 提示？

Question

下面是我的 Activity 。我通过点击两个不同按钮的 Intent 调用此 Activity 。现在我想要的是，当我点击第一个按钮打开下方 Activity 时，我想在编辑文本“Po No new”中显示提示，当我点击第二个按钮打开下方 Activity 时，我想在编辑文本“Po No”中显示提示老的”。我怎样才能做到这一点？

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>

Activity 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);

    }
}

按钮点击 -

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);
        }
    });

我将下面的代码放在我的 onCreateView fragment 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

@Moin Khan 试试这个，希望对你有帮助

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);
        }
    });

在第二个 Activity 中

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