调用第三方打印apk Epson iPrint解决思路

调用第三方打印apk Epson iPrint解决思路，目前仅有一个apk，爱普生打印，如何调用起来这个第三方apk？

1.使用反编译工具反编译爱普生打印APK，查看AndroidManifest.xml文件找到包名和爱普生打印预览Activity。

包名：package="epson.print"

打印预览界面Activity在AndroidManifest.xml的配置如下：

<activity android:configChanges="keyboard|keyboardHidden|orientation|screenSize" android:name="epson.print.ActivityDocsPrintPreview" android:screenOrientation="unspecified">
            <intent-filter>
                <span style="color:#ff0000;"><action android:name="android.intent.action.SEND"/></span>
                <action android:name="android.intent.action.VIEW"/>
                <category android:name="android.intent.category.DEFAULT"/>
                <span style="color:#ff0000;"><data android:mimeType="application/pdf"/></span>
                <data android:mimeType="application/msword"/>
                <data android:mimeType="application/vnd.ms-excel"/>
                <data android:mimeType="application/vnd.ms-powerpoint"/>
                <data android:mimeType="application/vnd.openxmlformats-officedocument.wordprocessingml.document"/>
                <data android:mimeType="application/vnd.openxmlformats-officedocument.presentationml.presentation"/>
                <data android:mimeType="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"/>
                <data android:mimeType="text/csv"/>
                <data android:mimeType="application/rtf"/>
                <data android:mimeType="text/rtf"/>
                <data android:mimeType="text/comma-separated-values"/>
            </intent-filter>
        </activity>

上面加红的可以看出掉起来这个Activity需要 actionandroid:name="android.intent.action.SEND" 和 <data android:mimeType="application/pdf"/>

2.在自己的代码中开始调用，出现“文件无法打开”；

3. 分析可以知道，打印预览是从文件浏览中打开的。查看反编译后的源代码。

这个activity一定是文件浏览Activity，这个Activity源代码中会包含startActivity函数，并让intent携带对应的参数传递给ActivityDocsPrintPreview。具体可以使用软件就会发现这个逻辑。

查看反编译后的源代码确实找到对应的代码片段如下，红色部分正是线索，intent使用STREAM携带了Uri参数：

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    const-string v3, "<span style="color:#ff0000;">android.intent.action.SEND</span>"

    invoke-virtual {v2, v3}, Landroid/content/Intent;->setAction(Ljava/lang/String;)Landroid/content/Intent;

    .line 536
    const-string v3, "<span style="color:#ff0000;">android.intent.extra.STREAM</span>"

    invoke-virtual {p1}, Ljava/io/File;->getAbsolutePath()Ljava/lang/String;

    move-result-object v4

    invoke-static {v4}, <span style="color:#ff0000;">Landroid/net/Uri;->parse(Ljava/lang/String;)Landroid/net/Uri;</span>

    move-result-object v4

    invoke-virtual {v2, v3, v4}, Landroid/content/Intent;-><span style="color:#ff0000;">putExtra(Ljava/lang/String;Landroid/os/Parcelable;)Landroid/content/Intent;</span>

    goto :goto_1

    .line 543
    .end local v2    # "myIntent":Landroid/content/Intent;
    :cond_2
    invoke-virtual {p1}, Ljava/io/File;->getAbsolutePath()Ljava/lang/String;

    move-result-object v3

    invoke-direct {p0, v3}, Lepson/print/fileBrower;->isFilePdf(Ljava/lang/String;)Z

    move-result v3

    if-nez v3, :cond_3

    invoke-virtual {p1}, Ljava/io/File;->getAbsolutePath()Ljava/lang/String;

    move-result-object v3

    invoke-static {v3}, Lepson/common/Utils;->isGConvertFile(Ljava/lang/String;)Z

    move-result v3

    if-eqz v3, :cond_5

    .line 545
    :cond_3
    invoke-virtual {p1}, Ljava/io/File;->getAbsolutePath()Ljava/lang/String;

    move-result-object v3

    invoke-direct {p0, v3}, Lepson/print/fileBrower;->getFileSize(Ljava/lang/String;)Z

    move-result v3

    if-eqz v3, :cond_4

    .line 546
    new-instance v2, Landroid/content/Intent;

    const-class v3, Lepson/print/ActivityDocsPrintPreview;

    invoke-direct {v2, p0, v3}, Landroid/content/Intent;-><init>(Landroid/content/Context;Ljava/lang/Class;)V

    .line 548
    .restart local v2    # "myIntent":Landroid/content/Intent;
    const-string v3, "from"

    const/4 v4, 0x3

    invoke-virtual {v2, v3, v4}, Landroid/content/Intent;->putExtra(Ljava/lang/String;I)Landroid/content/Intent;

    .line 550
    const-string v3, "send document"

    invoke-virtual {p1}, Ljava/io/File;->getAbsolutePath()Ljava/lang/String;

    move-result-object v4

    invoke-virtual {v2, v3, v4}, Landroid/content/Intent;->putExtra(Ljava/lang/String;Ljava/lang/String;)Landroid/content/Intent;

    .line 552
invoke-virtual {p0, v2}, Lepson/print/fileBrower;->startActivity(Landroid/content/Intent;)V

4.将上面的代码转化为调用爱普生打印apk的代码：

String epsonPrintApkPackageName = "epson.print";
Intent intent = new Intent();
intent.setAction("android.intent.action.SEND");
intent.setPackage(epsonPrintApkPackageName);
intent.setClassName(epsonPrintApkPackageName,"epson.print.ActivityDocsPrintPreview");
		
Uri uri = Uri.fromFile(new File(path));
intent.putExtra("android.intent.extra.STREAM", uri);
intent.setType("application/pdf");
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.addCategory(Intent.CATEGORY_DEFAULT);
getBaseContext().startActivity(intent);

代码已经可以成功运行了，在调用第三方apk使用的时候，如果不确定传入的参数，可以从反编译后的源代码中找到一些线索，这确实是一种方法。

调用第三方打印apk Epson iPrint解决思路

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