android – 从SD卡读取pdf文件

我想阅读存储在我的SD卡中的pdf文件,我尝试使用这个片段

    File file = new File(Environment.getExternalStorageDirectory()
            + "/vvveksperten" + "/ypc.pdf");

    PackageManager packageManager = getPackageManager();
    Intent testIntent = new Intent(Intent.ACTION_VIEW);
    testIntent.setType("application/pdf");
    List list = packageManager.queryIntentActivities(testIntent,
            PackageManager.MATCH_DEFAULT_ONLY);
    Intent intent = new Intent();
    intent.setAction(Intent.ACTION_VIEW);
    Uri uri = Uri.fromFile(file);
    intent.setDataAndType(uri, "application/pdf");
    startActivity(intent);

但它给了我一个错误.

ERROR/AndroidRuntime(2611): android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.VIEW dat=file:///mnt/sdcard/vvveksperten/ypc.pdf typ=application/pdf }

解决方法:

请检查您的设备是否有任何pdf阅读器应用程序,我认为不是..

只需使用此代码,

private void viewPdf(Uri file) {
        Intent intent;
        intent = new Intent(Intent.ACTION_VIEW);
        intent.setDataAndType(file, "application/pdf");
        try {
            startActivity(intent);
        } catch (ActivityNotFoundException e) {
            // No application to view, ask to download one
            AlertDialog.Builder builder = new AlertDialog.Builder(this);
            builder.setTitle("No Application Found");
            builder.setMessage("Download one from Android Market?");
            builder.setPositiveButton("Yes, Please",
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            Intent marketIntent = new Intent(Intent.ACTION_VIEW);
                            marketIntent
                                    .setData(Uri
                                            .parse("market://details?id=com.adobe.reader"));
                            startActivity(marketIntent);
                        }
                    });
            builder.setNegativeButton("No, Thanks", null);
            builder.create().show();
        }
    }

如果任何pdf阅读器应用程序不可用,那么此代码是从Android市场下载pdf阅读器,但请确保您的设备已预安装Android市场应用程序.所以我认为在Android设备上尝试这个,而不是模拟器.