Question

在我的申请中，我发送邮件。要发送邮件，我已将Gmail设为默认值。但是点击后退导航，我想导航回我的应用程序，但正在显示Gmail的收件箱。以下是我的代码：

            final Intent intent = new Intent(android.content.Intent.ACTION_SEND);
            intent.setType("text/plain");
            intent.putExtra(android.content.Intent.EXTRA_EMAIL, new String[]{ 

                  "abc.k@india.dharma.com" });    

            final PackageManager pm = getPackageManager();
            final List<ResolveInfo> matches = pm.queryIntentActivities(intent, 1);
            ResolveInfo best = null;

            for (final ResolveInfo info : matches)
                if (info.activityInfo.packageName.endsWith(".gm")
                        || info.activityInfo.name.toLowerCase()
                        .contains("gmail"))
                    best = info;
            if (best != null)
                intent.setClassName(best.activityInfo.packageName,
                        best.activityInfo.name);

            intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
            // Copy file to external storage
            InputStream in = null;
            OutputStream out = null;
            AssetManager assetManager = getAssets();
            LifeUser lt = new LifeUser(getApplicationContext());
            LifeTimestamp lts = new LifeTimestamp();
            String desFile = "genReport"
                    + lts.get(Calendar.DAY_OF_MONTH) + ".txt";
            try {
                lt.generateReportLog(desFile);

            } catch (Exception e) {
                Log.e("", e.getMessage());
            }
            // Get the Uri from the external file and add it to the
            // intent
            Uri uri = Uri.fromFile(new File(Environment
                    .getExternalStorageDirectory(), desFile));
            intent.putExtra(Intent.EXTRA_STREAM, uri);
            startActivity(intent);

Answer 1

从gmail单击后退按钮时，您的代码无关紧要。无论gmail定义为后退按钮的行为都将被执行。离开gmail后，将调用堆栈中的下一个较低的Activity，这可能是您的Activity。

从Gmail导航回应用程序

1 个答案: