将minSdkVersion从15更改为16

Question

When I changed my minSdkVersion then I am getting this error:

android.view.InflateException: Binary XML file line #43: Error inflating class TextView

Eariler it was working fine before I have made the changes.

Here is my style :

<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- All customizations that are NOT specific to a particular API-level can go here. -->
    </style>

    <style name="AppTheme.Dark" parent="Theme.AppCompat.NoActionBar">
        <item name="colorPrimary">@color/primary</item>
        <item name="colorPrimaryDark">@color/primary_dark</item>
        <item name="colorAccent">@color/white</item>
        <item name="colorControlNormal">@color/greyDark</item>
        <item name="colorControlActivated">@color/off_white</item>
        <item name="android:windowBackground">@color/pink</item>
        <item name="android:fontFamily">sans-serif-light</item>
        <item name="android:textStyle">normal</item>
        <item name="android:windowContentTransitions" tools:targetApi="lollipop">true</item>
        <item name="android:windowAllowEnterTransitionOverlap" tools:targetApi="lollipop">true</item>
        <item name="android:windowAllowReturnTransitionOverlap" tools:targetApi="lollipop">true</item>
        <item name="android:windowSharedElementEnterTransition" tools:targetApi="lollipop">@android:transition/move</item>
        <item name="android:windowSharedElementExitTransition" tools:targetApi="lollipop">@android:transition/move</item>

    </style>
    <style name="AlertDialogCustom" parent="@android:style/Theme.Dialog">
        <item name="android:textColor">@color/pink</item>
        <item name="android:typeface">normal</item>
        <item name="android:height">5dp</item>
        <item name="android:textSize">20sp</item>
        <item name="android:textStyle">bold</item>
        <item name="android:background">@color/white</item>
    </style>

I guess there is something wrong with the parent property of a style.

Answer 1

如果您正在更改您的版本，那么还要更改支持库。您必须更改支持库，例如，对于egfor api 23，您必须将appcompact库版本更改为23.希望此帮助。:)

Answer 2

You should try changing

<style name="AlertDialogCustom" parent="@android:style/Theme.Dialog">

to

<style name="AlertDialogCustom" parent="Theme.AppCompat.Dialog">

Answer 3

This is the issue with your font family which you are using in style. May be sans-serif-light font is not available in your assests>>fonts folder. So check with this how to use custom fonts in android.

Here are the steps to follow:

Android Studio:

Step1: Adding font family files to app

A) Go to the (project folder)

B) Then app>src>main

C) Create folder 'assets>fonts' into the main folder.

D) Put your 'abc.ttf' or 'abc.otf' font file into the fonts folder.

Step 2: Now Create attrs.xml under res folder if it's not exists and add declare-styleable

<?xml version="1.0" encoding="utf-8"?>
<resources>

<declare-styleable name="Font">
<attr name="typeface">
<enum name="FuturaLT" value="0" />
<enum name="FuturaLT_Heavy" value="1" />
<enum name="FuturaLT_Light" value="2" />
</attr>
</declare-styleable>

</resources>

//Here FuturaLT/FuturaLT_Heavy/FuturaLT_Light are file names

Note: – enum name should be font type name with underscore(_) uses, it will be easy for you to understand font family usage in your native code. No special character or other letter, otherwise you will got error in gen folder for same attribute id.

Step 3: Create your custom view(Button, TextView, EditText) class:-

package com.myapp.views;

import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.widget.TextView;

import com.myapp.R;

public class CustomTextView extends TextView  {

    public CustomTextView(Context context) {
        super(context);
    }

    public CustomTextView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public CustomTextView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        try {
            TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.Font);
            int font = a.getInt(R.styleable.Font_typeface, 0);
            a.recycle();
            String str;
            switch (font) {
                case 1:
                    str = "fonts/FuturaLT.otf";
                    break;
                case 2:
                    str = "fonts/FuturaLT_Heavy.otf";
                    break;
                case 3:
                    str = "fonts/FuturaLT_Light.otf";
                    break;
                default:
                    str = "fonts/FuturaLT.otf";
                    break;
            }

            setTypeface(FontManager.getInstance(getContext()).loadFont(str));

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @SuppressWarnings("unused")
    private void internalInit(Context context, AttributeSet attrs) {

    }
}

Step 4: Add FontManager.java support class

package com.myapp.views;

import android.content.Context;
import android.graphics.Typeface;

import java.util.HashMap;
import java.util.Map;

public class FontManager {
    private Map<String, Typeface> fontCache = new HashMap<String, Typeface>();
    private static FontManager instance = null;
    private Context mContext;

    private FontManager(Context mContext2) {
        mContext = mContext2;
    }

    public synchronized static FontManager getInstance(Context mContext) {
        if (instance == null) {
            instance = new FontManager(mContext);
        }
        return instance;
    }

    public Typeface loadFont(String font) {
        if (false == fontCache.containsKey(font)) {
            fontCache.put(font, Typeface.createFromAsset(mContext.getAssets(), font));
        }
        return fontCache.get(font);
    }
}

Step 5: Usage in XML layout

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

    <com.myapp.views.CustomTextView
        android:id="@+id/tv_time_slot"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        app:typeface="FuturaLT" />
</LinearLayout>

You can also use in java code directly:

Typeface tf = Typeface.createFromAsset(getAssets(), "fonts/FuturaLT.ttf");
tvText.setTypeface(tf);

Note:- If you don't use here FontManager to apply typeface and directly use then you are not able to see your views in graphics preview.