Java – how do I align these numbers with decimals in Android?

My activity fullscreen.xml has this excerpt, which works exactly as I want to produce decimal aligned output:

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_gravity="center_horizontal|top"
        android:gravity="center">

        <TextView
            android:layout_width="140dp"
            android:layout_height="24dp"
            android:text="-0.123"
            android:id="@+id/acc_x"
            android:layout_gravity="center_horizontal|top"
            android:textColor="#ffffff"
            android:gravity="center_vertical|end"
            android:layout_margin="0dp"
            style="@style/Base.TextAppearance.AppCompat.Large" />

        <TextView
            android:layout_width="140dp"
            android:layout_height="24dp"
            android:text="0.123"
            android:id="@+id/acc_y"
            android:layout_gravity="center_horizontal|top"
            android:textColor="#ffffff"
            android:gravity="center_vertical|end"
            android:layout_margin="0dp"
            style="@style/Base.TextAppearance.AppCompat.Large" />

        <TextView
            android:layout_width="140dp"
            android:layout_height="24dp"
            android:text="99.123"
            android:id="@+id/acc_z"
            android:layout_gravity="center_horizontal|top"
            android:textColor="#ffffff"
            android:gravity="center_vertical|end"
            android:layout_margin="0dp"
            style="@style/Base.TextAppearance.AppCompat.Large" />

        <TextView
            android:layout_width="140dp"
            android:layout_height="24dp"
            android:text="99.123"
            android:id="@+id/acc_T"
            android:layout_gravity="center_horizontal|top"
            android:textColor="#ffffff"
            android:gravity="center_vertical|end"
            android:layout_margin="0dp"
            style="@style/Base.TextAppearance.AppCompat.Large" />
    </LinearLayout>

However, when I use this code to calculate numbers and fill the same text box, the alignment changes:

        x = -0.123f;
        text = (TextView)findViewById(R.id.acc_x);
        text.setText(String.format("%-8.3f",x));

        y = 0.123f;
        text = (TextView)findViewById(R.id.acc_y);
        text.setText(String.format("%-8.3f",y));

        z = 99.123f;
        text = (TextView)findViewById(R.id.acc_z);
        text.setText(String.format("%-8.3f",z));

        T = 0;
        text = (TextView)findViewById(R.id.acc_T);
        text.setText(String.format("%-8.3f",T));

What can I do to keep the decimal point aligned?

This is my build.gradle. If it's important:

apply plugin: 'com.android.application'

android {
compileSdkVersion 21
buildToolsVersion "21.1.2"

defaultConfig {
    applicationId "com.example.app001"
    minSdkVersion 14
    targetSdkVersion 21
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
    minifyEnabled false
    proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
}

dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:21.0.3'
compile 'com.android.support:support-v4:21.0.3'
}

resolvent:

You don't need to change anything in layout.xml. I ran this code, changed the string format, and the problem disappeared

  x = -0.123f;
  text = (TextView)findViewById(R.id.acc_x);
  text.setText(String.format("%.3f",x));

  y = 0.123f;
  text = (TextView)findViewById(R.id.acc_y);
  text.setText(String.format("%.3f",y));

  z = 99.123f;
  text = (TextView)findViewById(R.id.acc_z);
  text.setText(String.format("%.3f",z));

  T = 0;
  text = (TextView)findViewById(R.id.acc_T);
  text.setText(String.format("%.3f",T));