启动在android中发送邮件的活动

Question

我正在设计一个发送邮件的应用程序.全部都已设置但是当代码到达emmulator中的以下行时,它显示"应用程序已意外停止"并且日志cat显示NullPointerException.我也发现了尽可能多的权限.Plz帮助我了解清单文件中必须给出的具体权限以及如何解决问题.

startActivity(Intent.createChooser(send, "This is the chooser title"));

发送是我的意图.

完整的log cat msg如下:

11-01 23:21:37.721: W/IInputConnectionWrapper(442): showStatusIcon on inactive InputConnection
11-01 23:21:39.781: I/msg(442): this is offhook
11-01 23:21:43.991: I/msg(442): this is idle
11-01 23:21:43.991: I/msgfinal(442): this is it
11-01 23:21:43.991: I/msg(442): this is from msg
11-01 23:21:43.991: I/sha(442): here
11-01 23:21:43.991: D/AndroidRuntime(442): Shutting down VM
11-01 23:21:43.991: W/dalvikvm(442): threadid=1: thread exiting with uncaught exception (group=0x40015560)
11-01 23:21:43.991: E/AndroidRuntime(442): FATAL EXCEPTION: main
11-01 23:21:43.991: E/AndroidRuntime(442): java.lang.NullPointerException
11-01 23:21:43.991: E/AndroidRuntime(442):  at android.app.Activity.startActivityForResult(Activity.java:2827)
11-01 23:21:43.991: E/AndroidRuntime(442):  at android.app.Activity.startActivity(Activity.java:2933)
11-01 23:21:43.991: E/AndroidRuntime(442):  at com.example.dialing.MainActivity.fun(MainActivity.java:33)
11-01 23:21:43.991: E/AndroidRuntime(442):  at com.example.dialing.PhoneCallListener.onCallStateChanged(MainActivity.java:104)
11-01 23:21:43.991: E/AndroidRuntime(442):  at android.telephony.PhoneStateListener$2.handleMessage(PhoneStateListener.java:319)
11-01 23:21:43.991: E/AndroidRuntime(442):  at android.os.Handler.dispatchMessage(Handler.java:99)
11-01 23:21:43.991: E/AndroidRuntime(442):  at android.os.Looper.loop(Looper.java:123)
11-01 23:21:43.991: E/AndroidRuntime(442):  at android.app.ActivityThread.main(ActivityThread.java:3683)
11-01 23:21:43.991: E/AndroidRuntime(442):  at java.lang.reflect.Method.invokeNative(Native Method)
11-01 23:21:43.991: E/AndroidRuntime(442):  at java.lang.reflect.Method.invoke(Method.java:507)
11-01 23:21:43.991: E/AndroidRuntime(442):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
11-01 23:21:43.991: E/AndroidRuntime(442):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
11-01 23:21:43.991: E/AndroidRuntime(442):  at dalvik.system.NativeStart.main(Native Method)
11-01 23:21:48.481: I/Process(442): Sending signal. PID: 442 SIG: 9

Plz注意到"这里"(第6行),它是Log.我给它检查的是它,它就是startActivity函数之前的行.

        Intent msg=new Intent(Intent.ACTION_SEND);
        String[] recipients={"myid@gmail.com"};

        msg.putExtra(Intent.EXTRA_EMAIL, recipients);

        msg.putExtra(Intent.EXTRA_TEXT, "This is the email body");
        msg.putExtra(Intent.EXTRA_SUBJECT, "This is the email subject");

        //msg.setType("message/rfc822");
        msg.setType("*/*");

        //context.startActivity(Intent.createChooser(msg, "This is the chooser title"));
        Log.i("msg","this is from msg");

        //calling into main activity
        MainActivity ma=new MainActivity();
        ma.fun(msg);

//这个函数在mainActivity中

public void fun(Intent send)
{
    Log.i("sha","here");
    startActivity(Intent.createChooser(send, "This is the chooser title"));

    Log.i("sha","here2");
}

Answer 1

走这条路:

Intent email = new Intent(Intent.ACTION_SEND);
    email.putExtra(Intent.EXTRA_EMAIL,new String[] { "rahul@mail.com"});
    email.putExtra(Intent.EXTRA_SUBJECT,"Contact Us");
    email.putExtra(Intent.EXTRA_TEXT,"sent a message using the contact us ");

    email.setType("message/rfc822");

    startActivityForResult(Intent.createChooser(email, "Choose an Email client:"),
                        1);

然后创建方法 onActivityResult

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {

    if(requestCode == MY_REQUEST_CODE) {
        if(resultCode == RESULT_OK) {


        } else {

            Intent ingoHome = new Intent(abc.this,
                    pqr.class);
            ingoHome.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            startActivity(ingoHome);


        }
    }

    finish();

}