android - 使编辑文本出现在android中设备的顶部和软键盘之间

Question

我有一个包含许多 ViewsStub 的 ScrollView 布局，这些 View stub 会根据用户操作膨胀(显示)，例如......回答第一个问题会使第二个问答字段(editText)出现

我的问题是在回答完第一个问题并点击提交后，下一个问题可见，但答案字段隐藏在软键盘下...用户看不到他正在输入的内容。

我想要的是任何新显示的 editText/spinner/checkbox 必须出现在屏幕顶部(动态滚动到这些 View )。

如何实现？？

Answer 1

以我的代码为例，您可以执行以下操作:将 XML 设为:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <ScrollView
        android:id="@+id/scrlv"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:background="#123789" >

        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:background="#1188ff" >

            <RelativeLayout
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_below="@+id/headerlayout"
                android:background="#456789" >

                <EditText
                    android:id="@+id/etemail"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginLeft="20dp"
                    android:layout_marginRight="20dp"
                    android:layout_marginTop="40dp"
                    android:hint="Text 1"
                    android:maxLines="3" />

                <EditText
                    android:id="@+id/etpassword"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:layout_alignLeft="@+id/etemail"
                    android:layout_alignRight="@+id/etemail"
                    android:layout_below="@+id/etemail"
                    android:hint="Text 2"
                    android:inputType="textPassword"
                    android:maxLines="3" />

                <EditText
                    android:id="@+id/etusername"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:layout_alignLeft="@+id/etemail"
                    android:layout_alignRight="@+id/etemail"
                    android:layout_below="@+id/etpassword"
                    android:hint="Text 3"
                    android:maxLines="3" />

                <EditText
                    android:id="@+id/etphone"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:layout_alignLeft="@+id/etemail"
                    android:layout_alignRight="@+id/etemail"
                    android:layout_below="@+id/etusername"
                    android:hint="Text 4"
                    android:inputType="text"
                    android:maxLines="5" />

                <CheckBox
                    android:id="@+id/chkterms"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_alignLeft="@+id/etemail"
                    android:layout_alignRight="@+id/etemail"
                    android:layout_below="@+id/etphone"
                    android:layout_marginTop="10dp"
                    android:text="Conditions Aplly"
                    android:textColor="@android:color/black" />

                <Button
                    android:id="@+id/btnlogin"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_below="@+id/chkterms"
                    android:layout_centerHorizontal="true"
                    android:layout_marginTop="10dp"
                    android:text="Login" />
            </RelativeLayout>
        </LinearLayout>
    </ScrollView>

</RelativeLayout>

然后代码:

[1] 获取设备的屏幕分辨率:高度、宽度

[2] 对 EditText 进行 onFocusChange

[3] 这样，如果您的 EditText 获得焦点，那么

[4] 获取 EditText 的 Bottom，如果 Bottom 大于 (ScreenHeight/3) 则

[5] 将 Your_ScrollView 滚动到 (left, (ScreenHeight/3));

public class MainActivity extends Activity implements OnClickListener{
    private EditText etEmail, etPassword, etUserName, etPhoneNo;
    private CheckBox chkTerms;
    private Button btnLogin;
    ScrollView scrlv;

    int sw, sh, left, bottom;

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

        scrlv = (ScrollView) findViewById(R.id.scrlv);

        etEmail = (EditText) findViewById(R.id.etemail);
        etPassword = (EditText) findViewById(R.id.etpassword);
        etUserName = (EditText) findViewById(R.id.etusername);
        etPhoneNo = (EditText) findViewById(R.id.etphone);

        DisplayMetrics dm = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(dm);
        sw = dm.widthPixels;
        sh = dm.heightPixels;
        System.out.println("Screen Width = " + sw);
        System.out.println("Screen Height = " + sh);

        chkTerms = (CheckBox) findViewById(R.id.chkterms);

        btnLogin = (Button) findViewById(R.id.btnlogin);
        btnLogin.setOnClickListener(this);

        etUserName.setOnFocusChangeListener(new OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                if(etUserName.hasFocus()) {
                    left = etUserName.getLeft();
                    bottom = etUserName.getTop();
                    if (bottom > sh / 3) {
                        System.out.println("Umn Left :: " + left);
                        System.out.println("Umn Bottom :: " + bottom);
                        scrlv.scrollTo(left, (sh/3));
                        left = etUserName.getLeft();
                        bottom = etUserName.getTop();
                        System.out.println("Umn Left :: " + left);
                        System.out.println("Unm Bottom :: " + bottom);
                    }
                }
            }
        });

        etPhoneNo.setOnFocusChangeListener(new OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                if(etPhoneNo.hasFocus()) {
                    left = etPhoneNo.getLeft();
                    bottom = etPhoneNo.getTop();
                    if (bottom > sh / 3) {
                        System.out.println("Phno Left :: " + left);
                        System.out.println("Phno Bottom :: " + bottom);
                        scrlv.scrollTo(0, (sh/3));
                        left = etPhoneNo.getLeft();
                        bottom = etPhoneNo.getTop();
                        System.out.println("Phno Left :: " + left);
                        System.out.println("Phno Bottom :: " + bottom);
                    }
                }
            }
        });

    }

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

    }
}