Android Studio 在 API < 17 上验证错误 运行

Android Studio verify error running on API < 17

我正在将一个应用程序从 Eclipse 移植到 Android Studio 并且 运行 在尝试 运行 模拟器上的应用程序 API less 时遇到验证错误超过 17。我将不胜感激有关如何处理此问题的任何指导。这是 API 8 模拟器上 logcat 中显示的内容:

12-27 01:48:27.189 431-431/com.zigzagworld.icjl.tanachbible W/dalvikvm: VFY: register1 v10 type 12, wanted 10
12-27 01:48:27.189 431-431/com.zigzagworld.icjl.tanachbible W/dalvikvm: VFY:  rejecting opcode 0x70 at 0x005e
12-27 01:48:27.189 431-431/com.zigzagworld.icjl.tanachbible W/dalvikvm: VFY:  rejected Lcom/zigzagworld/fonts/GlyphMetrics;.<init> (SSS[S)V
12-27 01:48:27.189 431-431/com.zigzagworld.icjl.tanachbible W/dalvikvm: Verifier rejected class Lcom/zigzagworld/fonts/GlyphMetrics;

紧随其后的是应用程序崩溃 java.lang.VerifyError(不足为奇)。同一个 .apk 文件 运行 在 API 级别 17 及以上就可以了。 API 17 及以上有不同的代码路径,但 GlyphMetrics class 在某些时候使用,而不管 API 级别。 (如果不同的代码路径会影响 class 在加载时是否产生验证错误,请有人告诉我!)

GlyphMetrics class 是一个非常简单的容器,其中包含一些关于我们在应用程序中使用的自制位图字体的度量信息:

package com.zigzagworld.fonts;

import static com.zigzagworld.fonts.Diacritics.LOWER_DIACRITIC;
import static com.zigzagworld.fonts.Diacritics.UPPER_DIACRITIC;

/**
 * Represents the layout metrics for a glyph.
 * 
 * @author Ted Hopp
 */
public final class GlyphMetrics {

    public static final short[] EMPTY_EXCLUSION = new short[0];
    public static final short[][] EMPTY_EXCLUSIONS = { EMPTY_EXCLUSION, EMPTY_EXCLUSION };
    /** The width of the glyph image, in pixels. */
    public short width;
    /** The height of the glyph image, in pixels. */
    public short height;
    /**
     * The distance in pixels between the top of the glyph image and the
     * baseline of the line. A positive value means that the top of the glyph
     * should be above the baseline of the line; a negative value means that the
     * top of the glyph should be below the baseline of the line.
     */
    public short baseline;
    /**
     * The upper and lower axes for placement of diacriticals. Each axis is the
     * distance from the left of the glyph image at which diacriticals should be
     * centered. (The formatting algorithm for the font may move diacriticals
     * from this position to avoid interference between glyphs.)
     */
    public short[] axes;
    /**
     * The upper and lower exclusion zone arrays. If there are <i>n</i> upper
     * (say) zones, the upper array has length length 2*<i>n</i>. The array has
     * the left edge of the first zone, the right edge of the first zone, the
     * left edge of the second zone, etc. The lower zone data are organized in
     * the same way.
     */
    public short[][] zones;

    public GlyphMetrics(short width, short height, short baseline, short[] layoutData) {
        this.width = width;
        this.height = height;
        this.baseline = baseline;
        axes = new short[2];
        width >>= 1; // for the rest of this, we need the half-width
        if (layoutData == null || layoutData.length == 0) {
            axes[UPPER_DIACRITIC] = axes[LOWER_DIACRITIC] = width;
            zones = EMPTY_EXCLUSIONS;
        } else {
            axes[UPPER_DIACRITIC] = layoutData[0];
            if (layoutData.length < 2) {
                axes[LOWER_DIACRITIC] = width;
            } else {
                axes[LOWER_DIACRITIC] = layoutData[1];
            }
            if (layoutData.length < 5) {
                zones = EMPTY_EXCLUSIONS;
            } else {
                int nUpper = layoutData[2] << 1;
                zones = new short[2][];
                zones[UPPER_DIACRITIC] = new short[nUpper];
                System.arraycopy(layoutData, 3, zones[UPPER_DIACRITIC], 0, nUpper);

                int lowerStart = 3 + nUpper;
                if (layoutData.length < 2 + lowerStart) {
                    zones[LOWER_DIACRITIC] = EMPTY_EXCLUSION;
                } else {
                    int nLower = layoutData[lowerStart++] << 1;
                    zones[LOWER_DIACRITIC] = new short[nLower];
                    System.arraycopy(layoutData, lowerStart, zones[LOWER_DIACRITIC], 0, nLower);
                }
            }
        }
    }
}

(导入的UPPER_DIACRITICLOWER_DIACRITIC分别是常量0和1。)

我正在使用 Android Studio 2.0 Preview 4 和 Gradle 插件 com.android.tools.build:gradle:2.0.0-alpha3 和 JDK 1.7.0_80 来构建它。这是 .apk 模块的 build.gradle 文件:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion '23.0.2'
    defaultConfig {
        applicationId "com.zigzagworld.icjl.tanachbible"
        minSdkVersion 8
        targetSdkVersion 23
        versionCode 10800310
        versionName "3.1.0"
        manifestPlaceholders = [
                appName: "App",
                v8TOCActivityName: "BaseTOCActivity",
                v8PurchaseActivityName: "PurchaseActivity",
                v17TOCActivityName: "TOCActivity",
                v17PurchaseActivityName: "PurchaseActivity",
        ]
    }
    signingConfigs {
        // redacted for this post
    }
    buildTypes {
        release {
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            //noinspection GroovyAssignabilityCheck
            signingConfig // redacted
        }
    }
    flavorDimensions "market"
    productFlavors {
        google {
            dimension "market"
            manifestPlaceholders = [
                appName: "App_Google",
                v8TOCActivityName: "TOCActivity_Google",
                v8PurchaseActivityName: "GooglePurchaseActivity",
                v17TOCActivityName: "TOCActivity_Google",
                v17PurchaseActivityName: "GooglePurchaseActivity"
            ]
        }
        amazon {
            dimension "market"
            manifestPlaceholders = [
                appName: "App_Amazon",
                v8TOCActivityName: "BaseTOCActivity",
                v8PurchaseActivityName: "PurchaseActivity",
                v17TOCActivityName: "TOCActivity",
                v17PurchaseActivityName: "PurchaseActivity"
            ]
        }
        sideLoad {
            dimension "market"
            manifestPlaceholders = [
                    appName: "App_Unlicensed",
                    v8TOCActivityName: "BaseTOCActivity",
                    v8PurchaseActivityName: "PurchaseActivity",
                    v17TOCActivityName: "TOCActivity",
                    v17PurchaseActivityName: "PurchaseActivity"
            ]
        }
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.1.1'
    compile 'com.android.support:support-annotations:23.1.1'
    compile project(':Tanach Data')
    googleCompile project(':Google Vending')
    amazonCompile project(':Amazon Vending')
}

问题出现在调试构建类型中,因此 ProGuard 此时不在画面中。

在这上面花了几天时间后,我发现将 gradle 插件从 2.0.0-alpha3 降级到 1.5.0 会使问题消失。

这就是我们为保持领先地位所付出的代价。