私はアプリを開発していますが、4 インチから 10 インチのほとんどの Android デバイスに対応する必要があり、デバイスに基づいてスケーリングするユニバーサル画面レイアウトを作成する方法があるかどうか疑問に思っていました。
これは、4 インチ、5 インチなどの画面カテゴリごとに異なるレイアウトとそれぞれのアクティビティを開発する現在のロジックとは対照的に、より良い方法です。
以下に示すように、私は DisplayMetrics フィールドとピタゴラスの定理を利用して画面サイズを決定します。たとえば、デバイスの高さを見つけるには、次の計算を行います。
double yDeviceScreenSize = Math.pow(DeviceScreenSize.heightPixels/DeviceScreenSize.ydpi,2);
上記のコード行は基本的に、ピクセル単位のディスプレイの絶対高さを、Y 次元の画面の 1 インチあたりの正確な物理ピクセルで割り、その後に値を 2 乗したものです。
同様の方法で、同じ方法で幅の数値を取得します。これを以下に示します。
double xDeviceScreenSize = Math.pow(DeviceScreenSize.widthPixels/DeviceScreenSize.xdpi,2);
上記の計算に続いて、以下に示すように平方根の値を取得します。これを使用して、同じ画面サイズのデバイスで開発およびテストしたものを選択します。
DeviceScreenSizeInInchesToDisplayLogInScreen = Math.sqrt(xDeviceScreenSize + yDeviceScreenSize);
以下に示すように、
<supports-screens android:smallScreens="true"
android:normalScreens="true"
android:largeScreens="true"
android:xlargeScreens="true"
android:anyDensity="true"/>
以下は、スプラッシュスクリーンの作成時に呼び出すコード画面決定メソッドです。
// Splash screen delay
public final void SplashScreenThread() {
// For tracking purposes record in logcat SplashScreenThread() method has been called
Log.i(TAG + "onCreate()", "SplashScreenThread(); HAS STARTED");
// Thread for the display of the SplashScreen
SightsandSoundsSplashThread = new Thread() {
@Override
public void run() {
try {
int waited = 0;
while(active && (waited < SplashTime)) {
sleep(100);
if(active) {
waited += 100;
}
}
} catch(InterruptedException e) {
// do nothing
Log.e(TAG + "SplashScreenThread()", "SplashScreenThread() ERROR IS AS FOLLOWS: " + e.toString());
} finally {
// Call method finish to kill any
finish();
// Fetch the screen size in order to call correct layout wrt the next screen - firstly create and object of type DisplayMetrics
DisplayMetrics DeviceScreenSize = new DisplayMetrics();
// Secondly fetch the window manager using method chaining
getWindowManager().getDefaultDisplay().getMetrics(DeviceScreenSize);
// Calculate the width of the screen in inches
double xDeviceScreenSize = Math.pow(DeviceScreenSize.widthPixels/DeviceScreenSize.xdpi,2);
// Record in logcat DeviceScreenSize.xdpi
Log.d(TAG,"DeviceScreenSize.widthPixels is: " + DeviceScreenSize.widthPixels + " and DeviceScreenSize.xdpi is: " + DeviceScreenSize.xdpi);
Log.d(TAG,"DeviceScreenSize.heightPixels is: " + DeviceScreenSize.heightPixels + " and DeviceScreenSize.ydpi is: " + DeviceScreenSize.ydpi);
// Calculate the height of the screen in inches
double yDeviceScreenSize = Math.pow(DeviceScreenSize.heightPixels/DeviceScreenSize.ydpi,2);
// Obtain screen size using pythagoras theorem
DeviceScreenSizeInInchesToDisplayLogInScreen = Math.sqrt(xDeviceScreenSize + yDeviceScreenSize);
// Record in logcat screen size in inches
Log.e(TAG,"DeviceScreenSize.widthPixels is: " + DeviceScreenSize.widthPixels + "\nDeviceScreenSize.heightPixels is: " + DeviceScreenSize.heightPixels + "\nScreen inches : " + DeviceScreenSizeInInchesToDisplayLogInScreen);
// Identify device screen size based on calculation of screen size
if (DeviceScreenSizeInInchesToDisplayLogInScreen < 2.9) {
Log.e(TAG,"< 2.9 inch range called");
Intent ScreenNotSupportedScreen = new Intent(SplashScreenFour.this, UnderDevltScn18inches.class);
startActivity(ScreenNotSupportedScreen);
Log.e(TAG,"DEVICE NOT ACCOMODATED - DEVICE DETERMINED TO BE LESS THAN 2.9 INCHES - ACTUAL DEVICE SIZE IS: " + DeviceScreenSizeInInchesToDisplayLogInScreen);
} else if ((DeviceScreenSizeInInchesToDisplayLogInScreen >= 2.9) && (DeviceScreenSizeInInchesToDisplayLogInScreen < 3.6)) {
Log.e(TAG,"2.9 to 3.6 inch range called");
Intent ScreenNotSupportedScreen = new Intent(SplashScreenFour.this, UnderDevltScn29inches.class);
startActivity(ScreenNotSupportedScreen);
Log.e(TAG,"DEVICE NOT ACCOMODATED - ACTUAL DEVICE SIZE IS: " + DeviceScreenSizeInInchesToDisplayLogInScreen);
} else if ((DeviceScreenSizeInInchesToDisplayLogInScreen >= 3.6) && (DeviceScreenSizeInInchesToDisplayLogInScreen < 3.8)) {
Log.e(TAG,"3.6 to 3.8 inch range called");
Intent ScreenNotSupportedScreen = new Intent(SplashScreenFour.this, UnderDevltScn29inches.class);
startActivity(ScreenNotSupportedScreen);
Log.e(TAG,"DEVICE NOT ACCOMODATED - ACTUAL DEVICE SIZE IS: " + DeviceScreenSizeInInchesToDisplayLogInScreen);
} else if ((DeviceScreenSizeInInchesToDisplayLogInScreen >= 3.8) && (DeviceScreenSizeInInchesToDisplayLogInScreen < 4.0)) {
Log.e(TAG,"3.8 to 4.0 inch range called");
Intent loginscreen = new Intent(SplashScreenFour.this, LogInScreen38inches.class);
startActivity(loginscreen);
} else if ((DeviceScreenSizeInInchesToDisplayLogInScreen >= 4.0) && (DeviceScreenSizeInInchesToDisplayLogInScreen < 4.28)) {
Log.e(TAG,"4.0 to 4.28 inch range called");
Intent loginscreen = new Intent(SplashScreenFour.this, LogInScreen4inches.class);
startActivity(loginscreen);
Log.e(TAG,"DEVICE NOT ACCOMODATED - ACTUAL DEVICE SIZE IS: " + DeviceScreenSizeInInchesToDisplayLogInScreen);
} else if ((DeviceScreenSizeInInchesToDisplayLogInScreen >= 4.28) && (DeviceScreenSizeInInchesToDisplayLogInScreen < 4.8)) {
Log.e(TAG,"4.28 to 4.3 inch range called");
Intent loginscreen = new Intent(SplashScreenFour.this, LogInScreen428inches.class);
startActivity(loginscreen);
Log.e(TAG,"DEVICE NOT ACCOMODATED - ACTUAL DEVICE SIZE IS: " + DeviceScreenSizeInInchesToDisplayLogInScreen);
} else if ((DeviceScreenSizeInInchesToDisplayLogInScreen >= 4.8) && (DeviceScreenSizeInInchesToDisplayLogInScreen < 4.9)) {
Log.e(TAG,"4.8 to 4.9 inch range called");
Intent loginscreen = new Intent(SplashScreenFour.this, LogInScreen465inches.class);
startActivity(loginscreen);
Log.e(TAG,"DEVICE NOT ACCOMODATED - ACTUAL DEVICE SIZE IS: " + DeviceScreenSizeInInchesToDisplayLogInScreen);
} else if ((DeviceScreenSizeInInchesToDisplayLogInScreen >= 4.9) && (DeviceScreenSizeInInchesToDisplayLogInScreen < 5.5)) {
Log.e(TAG,"4.9 to 5.5 inch range called");
Intent ScreenNotSupportedScreen = new Intent(SplashScreenFour.this, LogInScreen498inches.class);
startActivity(ScreenNotSupportedScreen);
Log.e(TAG,"DEVICE NOT ACCOMODATED - ACTUAL DEVICE SIZE IS: " + DeviceScreenSizeInInchesToDisplayLogInScreen);
} else if ((DeviceScreenSizeInInchesToDisplayLogInScreen >= 5.5) && (DeviceScreenSizeInInchesToDisplayLogInScreen < 5.9)) {
Log.e(TAG,"5.5 to 5.9 inch range called");
Intent loginscreen = new Intent(SplashScreenFour.this, LogInScreen57inches.class);
startActivity(loginscreen);
Log.e(TAG,"DEVICE NOT ACCOMODATED - ACTUAL DEVICE SIZE IS: " + DeviceScreenSizeInInchesToDisplayLogInScreen);
} else if ((DeviceScreenSizeInInchesToDisplayLogInScreen >= 5.9) && (DeviceScreenSizeInInchesToDisplayLogInScreen < 6.8)) {
Log.e(TAG,"5.9 to 6.9 inch range called");
Intent loginscreen = new Intent(SplashScreenFour.this, LogInScreen59inches.class);
startActivity(loginscreen);
Log.e(TAG,"DEVICE NOT ACCOMODATED - ACTUAL DEVICE SIZE IS: " + DeviceScreenSizeInInchesToDisplayLogInScreen);
} else if ((DeviceScreenSizeInInchesToDisplayLogInScreen >= 6.8) && (DeviceScreenSizeInInchesToDisplayLogInScreen < 7.0)) {
Log.e(TAG,"6.0 to 7.0 inch range called");
Intent ScreenNotSupportedScreen = new Intent(SplashScreenFour.this, LogInScreen699inches.class);
startActivity(ScreenNotSupportedScreen);
Log.e(TAG,"DEVICE NOT ACCOMODATED - ACTUAL DEVICE SIZE IS: " + DeviceScreenSizeInInchesToDisplayLogInScreen);
} else if ((DeviceScreenSizeInInchesToDisplayLogInScreen >= 7.0) && (DeviceScreenSizeInInchesToDisplayLogInScreen < 8.0)) {
Log.e(TAG,"7.0 to 8.0 inch range called");
Intent loginscreen = new Intent(SplashScreenFour.this, LogInScreen.class);
startActivity(loginscreen);
} else if ((DeviceScreenSizeInInchesToDisplayLogInScreen >= 8.0) && (DeviceScreenSizeInInchesToDisplayLogInScreen < 9.0)) {
Log.e(TAG,"8.0 to 9.0 inch range called");
Intent ScreenNotSupportedScreen = new Intent(SplashScreenFour.this, UnderDevltScnFinish.class);
startActivity(ScreenNotSupportedScreen);
Log.e(TAG,"DEVICE NOT ACCOMODATED - ACTUAL DEVICE SIZE IS: " + DeviceScreenSizeInInchesToDisplayLogInScreen);
} else if ((DeviceScreenSizeInInchesToDisplayLogInScreen >= 9.0) && (DeviceScreenSizeInInchesToDisplayLogInScreen <= 10.2)) {
Log.e(TAG,"> 9.0 to 10.2 inch range called");
Intent loginscreen = new Intent(SplashScreenFour.this, LogInScreen10inches.class);
startActivity(loginscreen);
Log.e(TAG,"DEVICE NOT ACCOMODATED - ACTUAL DEVICE SIZE IS: " + DeviceScreenSizeInInchesToDisplayLogInScreen);
}
}
}
};
SightsandSoundsSplashThread.start();
}
以下は、私の位置を示す私のマニフェストです
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="bge.applcs.dsa"
android:versionCode="7"
android:versionName="1.07">
<uses-sdk
android:minSdkVersion="8"
android:maxSdkVersion="18"
android:targetSdkVersion="8"/>
<supports-screens android:smallScreens="true"
android:normalScreens="true"
android:largeScreens="true"
android:xlargeScreens="true"
android:anyDensity="true"/>
<application
android:icon="@drawable/iclauncher96"
android:label="@string/appname"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen">
<uses-library android:name="android.test.runner" />
<!-- Splash screen -->
<activity
android:name="com.applcs.SplashScreenFour"
android:screenOrientation="landscape">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
以下は、私が作成したレイアウトの例です。
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/llbgedsafinccalclayout7inches"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/imgplainbackground"
android:orientation="horizontal">
<RelativeLayout
android:id="@+id/rlbgedsafinccalclayout7inches"
android:layout_width="925dp"
android:layout_height="300dp"
android:layout_marginTop="100dp"
android:layout_marginLeft="45dp"
android:background="@drawable/imgbgedsafinccalcmainbitbgnd2">
<!-- <TextView
android:id="@+id/tvcurrencysign"
android:layout_width="wrap_content"
android:layout_height="31dp"
android:layout_marginTop="10dp"
android:layout_marginLeft="330dp"
android:paddingTop="4dp"
android:textSize="18sp"
android:textColor="#FFD700"
android:background="#07000000"/> -->
<EditText
android:id="@+id/ettotalvalue7inches"
android:singleLine="true"
android:layout_width="215dp"
android:layout_height="wrap_content"
android:layout_marginTop="14dp"
android:layout_marginLeft="389dp"
android:maxLength="9"
android:layout_gravity="center_vertical|right"
android:background="#07000000"
android:textColor="#FFD700"
android:textSize="19sp"
android:ems="10"
android:inputType="numberDecimal|numberSigned"
android:digits="0123456789."
android:selectAllOnFocus="true"/>
<ImageButton
android:id="@+id/btngenerate7inches"
android:layout_width="276dp"
android:layout_height="54dp"
android:layout_marginLeft="45dp"
android:layout_toRightOf="@+id/ettotalvalue7inches"
android:background="@drawable/btngeneratebgnd"/>
<ImageButton
android:id="@+id/btntwoyears7inches"
android:layout_width="73dp"
android:layout_height="47dp"
android:layout_marginTop="56dp"
android:layout_marginLeft="5dp"
android:layout_below="@+id/ettotalvalue7inches"
android:background="@drawable/btntwoyears"/>
<ImageButton
android:id="@+id/btntthreeyears7inches"
android:layout_width="73dp"
android:layout_height="47dp"
android:layout_marginTop="56dp"
android:layout_marginLeft="2dp"
android:layout_below="@+id/ettotalvalue7inches"
android:layout_toRightOf="@+id/btntwoyears7inches"
android:background="@drawable/btnthreeyears"/>
<ImageButton
android:id="@+id/btnfouryears7inches"
android:layout_width="73dp"
android:layout_height="47dp"
android:layout_marginTop="56dp"
android:layout_marginLeft="1dp"
android:layout_below="@+id/ettotalvalue7inches"
android:layout_toRightOf="@+id/btntthreeyears7inches"
android:background="@drawable/btnfouryears"/>
<ImageButton
android:id="@+id/btnfiveyears7inches"
android:layout_width="74dp"
android:layout_height="47dp"
android:layout_marginTop="56dp"
android:layout_marginLeft="1dp"
android:layout_below="@+id/ettotalvalue7inches"
android:layout_toRightOf="@+id/btnfouryears7inches"
android:background="@drawable/btnfiveyears"/>
<TextView
android:id="@+id/tvweeklypayment"
android:layout_width="122dp"
android:layout_height="25dp"
android:layout_marginTop="22dp"
android:layout_marginLeft="310dp"
android:layout_below="@+id/btntwoyears7inches"
android:paddingTop="6dp"
android:paddingLeft="0dp"
android:textSize="12sp"
android:textColor="#FFD700"
android:background="#07000000"/>
<TextView
android:id="@+id/tvfirstpayment"
android:layout_width="122dp"
android:layout_height="25dp"
android:layout_marginTop="21dp"
android:layout_marginLeft="310dp"
android:layout_below="@+id/tvweeklypayment"
android:paddingTop="6dp"
android:paddingLeft="0dp"
android:textSize="12sp"
android:textColor="#FFD700"
android:background="#07000000"/>
<TextView
android:id="@+id/tvmonthlypayment"
android:layout_width="122dp"
android:layout_height="25dp"
android:layout_marginTop="22dp"
android:layout_marginLeft="310dp"
android:layout_below="@+id/tvfirstpayment"
android:paddingTop="6dp"
android:paddingLeft="0dp"
android:textSize="12sp"
android:textColor="#FFD700"
android:background="#07000000"/>
<TextView
android:id="@+id/tvtotalcostpayment"
android:layout_width="122dp"
android:layout_height="25dp"
android:layout_marginTop="22dp"
android:layout_marginLeft="351dp"
android:layout_below="@+id/btnfiveyears7inches"
android:layout_toRightOf="@+id/tvweeklypayment"
android:paddingTop="6dp"
android:paddingLeft="0dp"
android:textSize="12sp"
android:textColor="#FFD700"
android:background="#07000000"/>
<TextView
android:id="@+id/tvtaxreliefpayment"
android:layout_width="122dp"
android:layout_height="25dp"
android:layout_marginTop="22dp"
android:layout_marginLeft="351dp"
android:layout_below="@+id/tvtotalcostpayment"
android:layout_toRightOf="@+id/tvfirstpayment"
android:paddingTop="6dp"
android:paddingLeft="0dp"
android:textSize="12sp"
android:textColor="#FFD700"
android:background="#07000000"/>
<TextView
android:id="@+id/tvnetcostpayment"
android:layout_width="122dp"
android:layout_height="25dp"
android:layout_marginTop="21dp"
android:layout_marginLeft="351dp"
android:layout_below="@+id/tvtaxreliefpayment"
android:layout_toRightOf="@+id/tvmonthlypayment"
android:paddingTop="4dp"
android:paddingLeft="0dp"
android:textSize="12sp"
android:textColor="#FFD700"
android:background="#07000000"/>
<TextView
android:id="@+id/tvnumbofmonthlypayments"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="19dp"
android:layout_below="@+id/tvtaxreliefpayment"
android:layout_marginLeft="15dp"
android:textSize="19sp"
android:text="24"
android:textColor="#FFD700"
android:background="#07000000"/>
</RelativeLayout>
<RelativeLayout
android:id="@+id/rlnotes7inches"
android:layout_width="925dp"
android:layout_height="300dp"
android:layout_marginTop="100dp"
android:layout_marginLeft="45dp"
android:background="@drawable/imgnotesbgnd">
</RelativeLayout>
<TextView
android:id="@+id/tvinvalidentry7inches"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:layout_marginLeft="370dp"
android:layout_below="@+id/rlbgedsafinccalclayout7inches"
android:textSize="25sp"
android:textColor="#FF0000"
android:background="#07000000"/>
<ImageButton
android:id="@+id/btninfo7inches"
android:layout_width="65dp"
android:layout_height="60dp"
android:layout_marginTop="82dp"
android:layout_marginLeft="12dp"
android:layout_below="@+id/rlbgedsafinccalclayout7inches"
android:background="@drawable/btninfobgnd"/>
<TextView
android:id="@+id/tvdateandtime7inches"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="95dp"
android:layout_marginLeft="515dp"
android:layout_below="@+id/rlbgedsafinccalclayout7inches"
android:layout_toRightOf="@+id/btninfo7inches"
android:background="#07000000"
android:textColor="#FFFFFF"
android:textSize="25sp"
android:textStyle="bold" />
<DigitalClock
android:id="@+id/digitalclock7inches"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="95dp"
android:background="#07000000"
android:layout_below="@+id/rlbgedsafinccalclayout7inches"
android:layout_toRightOf="@+id/tvdateandtime7inches"
android:textColor="#FFFFFF"
android:textSize="25sp"
android:textStyle="bold"/>
</RelativeLayout>
助けてくれてありがとう。