我试图从外部apk文件启动活动。 apk文件是一个简单的文本显示,我从URL下载到/ mnt/sdcard /中的本地挂载目录中。一切工作正常到这一点。 现在,我想从该文件开始一个活动,并且出现错误。两种类型,取决于意图的建设。下面是与关联的LogCat的两个实现,'targetFilePath'是相同的。 案例一:从apk文件开始活动
try {
Intent install = new Intent(Intent.ACTION_VIEW)
.setData(Uri.fromFile(new File(targetFilePath)))
.setType("application/vnd.android.package-archive");
startActivity(install);
}
catch (Exception e) {
e.printStackTrace();
Toast.makeText(DownloadFile.this, "apk file launch error: " + e.getMessage(), Toast.LENGTH_LONG).show();
}
的logcat的:
08-26 17:03:02.153: I/ActivityManager(59): Starting activity: Intent { act=android.intent.action.VIEW typ=application/vnd.android.package-archive }
08-26 17:03:02.153: W/System.err(390): android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.VIEW typ=application/vnd.android.package-archive }
08-26 17:03:02.162: W/System.err(390): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1408)
08-26 17:03:02.162: W/System.err(390): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1378)
08-26 17:03:02.162: W/System.err(390): at android.app.Activity.startActivityForResult(Activity.java:2817)
08-26 17:03:02.162: W/System.err(390): at android.app.Activity.startActivity(Activity.java:2923)
08-26 17:03:02.162: W/System.err(390): at com.agorasoft.sandbox.DownloadFile$1.onClick(DownloadFile.java:137)
08-26 17:03:02.162: W/System.err(390): at android.view.View.performClick(View.java:2408)
08-26 17:03:02.172: W/System.err(390): at android.view.View$PerformClick.run(View.java:8816)
08-26 17:03:02.172: W/System.err(390): at android.os.Handler.handleCallback(Handler.java:587)
08-26 17:03:02.172: W/System.err(390): at android.os.Handler.dispatchMessage(Handler.java:92)
08-26 17:03:02.172: W/System.err(390): at android.os.Looper.loop(Looper.java:123)
08-26 17:03:02.182: W/System.err(390): at android.app.ActivityThread.main(ActivityThread.java:4627)
08-26 17:03:02.182: W/System.err(390): at java.lang.reflect.Method.invokeNative(Native Method)
08-26 17:03:02.182: W/System.err(390): at java.lang.reflect.Method.invoke(Method.java:521)
08-26 17:03:02.182: W/System.err(390): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
08-26 17:03:02.182: W/System.err(390): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
08-26 17:03:02.182: W/System.err(390): at dalvik.system.NativeStart.main(Native Method)
08-26 17:03:21.761: D/SntpClient(59): request time failed: java.net.SocketException: Address family not supported by protocol
案例二:
try {
Intent intent = new Intent(Intent.ACTION_VIEW);
Uri apkUri = Uri.fromFile(new File(targetFilePath));
intent.setDataAndType(apkUri, "application/vnd.android.package-archive");
startActivity(intent);
}
catch (Exception e) {
e.printStackTrace();
Toast.makeText(DownloadFile.this, "apk file launch error: " + e.getMessage(), Toast.LENGTH_LONG).show();
}
解析错误弹出窗口:有解析包
问题The LogCat:
08-26 17:09:48.862: W/PackageParser(329): Unable to read AndroidManifest.xml of /mnt/sdcard/Downloads/ApkTest.apk
08-26 17:09:48.862: W/PackageParser(329): java.io.FileNotFoundException: AndroidManifest.xml
08-26 17:09:48.862: W/PackageParser(329): at android.content.res.AssetManager.openXmlAssetNative(Native Method)
08-26 17:09:48.862: W/PackageParser(329): at android.content.res.AssetManager.openXmlBlockAsset(AssetManager.java:485)
08-26 17:09:48.862: W/PackageParser(329): at android.content.res.AssetManager.openXmlResourceParser(AssetManager.java:453)
08-26 17:09:48.862: W/PackageParser(329): at android.content.pm.PackageParser.parsePackage(PackageParser.java:396)
08-26 17:09:48.862: W/PackageParser(329): at com.android.packageinstaller.PackageUtil.getPackageInfo(PackageUtil.java:79)
08-26 17:09:48.862: W/PackageParser(329): at com.android.packageinstaller.PackageInstallerActivity.onCreate(PackageInstallerActivity.java:242)
08-26 17:09:48.862: W/PackageParser(329): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
08-26 17:09:48.862: W/PackageParser(329): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
08-26 17:09:48.862: W/PackageParser(329): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
08-26 17:09:48.862: W/PackageParser(329): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
08-26 17:09:48.862: W/PackageParser(329): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
08-26 17:09:48.862: W/PackageParser(329): at android.os.Handler.dispatchMessage(Handler.java:99)
08-26 17:09:48.862: W/PackageParser(329): at android.os.Looper.loop(Looper.java:123)
08-26 17:09:48.862: W/PackageParser(329): at android.app.ActivityThread.main(ActivityThread.java:4627)
08-26 17:09:48.862: W/PackageParser(329): at java.lang.reflect.Method.invokeNative(Native Method)
08-26 17:09:48.862: W/PackageParser(329): at java.lang.reflect.Method.invoke(Method.java:521)
08-26 17:09:48.862: W/PackageParser(329): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
08-26 17:09:48.862: W/PackageParser(329): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
08-26 17:09:48.862: W/PackageParser(329): at dalvik.system.NativeStart.main(Native Method)
08-26 17:09:48.862: W/PackageInstaller(329): Parse error when parsing manifest. Discontinuing installation
08-26 17:09:49.902: I/ActivityManager(59): Displayed activity com.android.packageinstaller/.PackageInstallerActivity: 1168 ms (total 1168 ms)
对不起,冗长的参数,但它似乎很奇怪,首先,它不起作用,然后我有意图/安装定义的两种语法不同的行为。 调用应用程序和apk文件都具有相同的SDK目标/分钟版本。调用应用程序清单中没有为这段代码设置特殊权限(我是否需要任何?)。 感谢
第二种情况似乎是正确的,但是您下载的apk文件已损坏,这就是为什么它会崩溃 – nandeesh
谢谢nandeesh。下载的文件确实损坏了,我无法想象它是由此产生的,但是一个简单的cmp检查立即启动了它。 –