Question

我已经完成了一个简单的Android应用程序，它在我的GenyMotion模拟器上工作正常。但是，当我在平板电脑上运行时，它占据了屏幕的十分之一。

我该如何纠正这个问题？

我在应用程序中添加了一个示例Activity，XML和Manifest文件。

应用程序中的示例活动：

/**
 * Class containing activity that allows the user to enter a number (from 1-12)
 * for which they wish to view the times tables
 * @author Ross
 *
 */
public class Practice extends Activity implements View.OnClickListener {

    // Declaring Variables
    Button go2;
    EditText enterNumber2;
    TextView top2;
    TextView bottom2;
    private Integer convertedNumber2; 

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.practice);

        // calling method to initialise variables
        initialiseVars();

        // setting on click listeners for edit text and button
        go2.setOnClickListener(this);
        enterNumber2.setOnClickListener(this);

    }

    /**
     * method to initialise all of the buttons, Textviews etc (used to
     * clean up onCreate method)
     */
    private void initialiseVars() {

        //Initialising all the buttons text views etc from the xml
        go2 = (Button) findViewById(R.id.btnGoPractice);
        enterNumber2 = (EditText) findViewById(R.id.etEnterNumberPractce);
        top2 = (TextView) findViewById(R.id.tvTopPractice);
        bottom2 = (TextView) findViewById(R.id.tvBottomPractice);

    }

    /**
     * Method with on click listener that adds functionality for all of the
     * buttons, text views etc
     * 
     * @param view
     */
    public void onClick(View view) {

        // switch statement which determines what is clicked
        switch ((view).getId()) {
        case R.id.btnGoPractice:


            // sets text view equal to what is entered in editText
            final String entry = enterNumber2.getText().toString().trim();

            try {
                //parsing String
                convertedNumber2 = Integer.parseInt(entry);
            } catch (Exception e) {
                //handle exception
                e.printStackTrace();
            }

            //Setting up next activity to open via intent
            Intent intent = new Intent(this, PracticeTest.class);
            //Validation to ensure number is between 1 and 12
            if (convertedNumber2 >= 1 && convertedNumber2 <= 12) {
                //pass int value
                intent.putExtra("convertedNumber2", convertedNumber2);

                //open activity
                startActivity(intent);

            } else {
                //error message
                Toast.makeText( Practice.this, "Please enter a number between 1 and 12!", Toast.LENGTH_SHORT).show();
            }



        }
    }

}

对应的XML：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="15dp" >

    <TextView
        android:id="@+id/tvTopPractice"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="I want to practice the: "
        android:textSize="25dp" />

    <EditText
        android:id="@+id/etEnterNumberPractce"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:hint="Enter Number..."
        android:inputType="number" >
    </EditText>

    <TextView
        android:id="@+id/tvBottomPractice"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Times tables!"
        android:textSize="25dp" />

    <Button
        android:id="@+id/btnGoPractice"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:layout_gravity="center"
        android:text="Go" />

</LinearLayout>

清单申请文件：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.multapply"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/mathsicon"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".Menu"
            android:label="Main Menu" >
            <intent-filter>
                <action android:name="com.example.multapply.menu" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name=".Splash"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".ViewTimesTables"
            android:label=" View Times Tables" >
        </activity>
        <activity
            android:name=".ViewTimesTablesDisplay"
            android:label=" View Times Tables" >
        </activity>
        <activity
            android:name=".Practice"
            android:label="Practice" >
        </activity>
        <activity
            android:name=".PracticeTest"
            android:label="Practice" >
        </activity>
        <activity
            android:name=".PracticeResults"
            android:label="Practice Results" >
        </activity>
        <activity
            android:name=".RandomTest"
            android:label="Random Test" >
        </activity>
        <activity
            android:name=".RandomTestResults"
            android:label="Random Test Results" >
        </activity>

        <activity
            android:name=".MyArrayAdapter"
            android:label="@string/app_name" >
        </activity>
        <activity
            android:name=".MyArrayAdapterPractice"
            android:label="@string/app_name" >
        </activity>
        <activity
            android:name=".About"
            android:label="About" >
        </activity>

    </application>

</manifest>

Answer 1

ldpi，mdpi和hdpi是指 屏幕密度 ，其中 表示可以容纳多少像素 强>

它们之间的像素比率是：

ldpi = 1:0.75 mdpi = 1:1 hdpi = 1:1.5 xhdpi = 1:2 xxhdpi = 1:3

所以我们拍摄一张大小为100X100的图片：

for mdpi it should be 100X100 for ldpi it should be 75X75 for hdpi it should be 150X150 for xhdpi it should be 200X200 for xxhdpi it should be 300X300

和

Android自行管理所有这些，您只需在相关文件夹中提供布局和图像

res/layout/my_layout.xml // layout for normal screen size ("default") res/layout-small/my_layout.xml // layout for small screen size res/layout-large/my_layout.xml // layout for large screen size res/layout-xlarge/my_layout.xml // layout for extra large screen size res/layout-xlarge-land/my_layout.xml // layout for extra large in landscape orientation res/drawable-mdpi/my_icon.png // bitmap for medium density res/drawable-hdpi/my_icon.png // bitmap for high density res/drawable-xhdpi/my_icon.png // bitmap for extra high density

Answer 2

对于平板电脑和大屏幕

创建文件夹名称 - ＆gt; res {下面的layout-sw600dp并粘贴布局中的所有布局。并根据需要设置它们。并把你的形象当作Golu所说的..

你必须为多个屏幕创建最多三种不同尺寸的图像。

将它们放入ldpi，mdpi，hdpi xhdpi

Android：如何创建可扩展到不同屏幕大小的应用程序？

2 个答案: