Question

我正在写一本食谱书，我遇到了一个问题 - 当我点击我的菜单项时，应该发送电子邮件，电子邮件地址和预先填写的主题，没有任何反应......

任何想法为什么???

public class recipedisplayscreen extends Activity {

TextView EmailAddress;

TextView EmailSubject;

     @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.recipedisplayscreen);

        TextView MethodDisplay = (TextView) findViewById(R.id.textView3);
        TextView IngredientsDisplay = (TextView) findViewById(R.id.textView5);


        Intent i = getIntent();
        String Ingredients = i.getStringExtra("textView1");
        String Method = i.getStringExtra("textView2");
        Log.e("recipedisplayscreen", Ingredients + "." + Method);

        MethodDisplay.setText(Method);
        IngredientsDisplay.setText(Ingredients);

        EmailAddress=(TextView) findViewById(R.id.textView2); 
        EmailSubject=(TextView) findViewById(R.id.textView4); 


        ActionBar actionBar = getActionBar();
        setTitle(R.string.title);
        actionBar.setDisplayHomeAsUpEnabled(true);
        setTitle(Method);}

        @Override
        public boolean onOptionsItemSelected(MenuItem item) {
            switch (item.getItemId()) {
                case android.R.id.home:
                    // App icon in action bar clicked; go home
                    Intent intent = new Intent(this, MainScreen.class);
                    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                    startActivity(intent);
                    return true;
                default:
                    return super.onOptionsItemSelected(item);
            }
        }

        public boolean onOptionsItemSelected1(MenuItem recipe_suggest) {
            final Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND); 
            emailIntent.setType("plain/text"); 
            emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL, new String[]{ EmailAddress.getText().toString()}); 
            emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, EmailSubject.getText()); 

            startActivity(Intent.createChooser(emailIntent, "Send mail..."));
            return true;
        }




     @Override
        public boolean onCreateOptionsMenu(Menu menu) {
            MenuInflater inflater = getMenuInflater();
            inflater.inflate(R.menu.recipe_menu1, menu);
            return true;         
    }    
}

Answer 1

我相信这就是你想要的：D删除 onOptionsItemSelected1 并用此替换 onOptionsItemSelected ，假设recipe_suggest是菜单项的id？

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
                // App icon in action bar clicked; go home
                Intent intent = new Intent(this, MainScreen.class);
                intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                startActivity(intent);
                return true;
            case R.id.recipe_suggest:
                //Other menu item I believe
                final Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND); 
                emailIntent.setType("plain/text"); 
                emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL, new String[]{                 EmailAddress.getText().toString()}); 
                emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, EmailSubject.getText()); 

                startActivity(Intent.createChooser(emailIntent, "Send mail..."));
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }

开关的作用是将“switch”中的对象与case匹配，匹配“switch”的情况得到执行，所以如果菜单项id（MenuItem item; item.getItemId（））匹配ID是android.R.id.home还是R.id.recipe_suggest（我假设您正在使用操作栏，因为您指的是Android R文件？）这就是我应该如何做到最好的知识:)

Answer 2

因为你有两个onOptionsItemSelected？好吧，一个名为onOptionsItemSelected * 1 *，需要将其合并到真实的一个。

Answer 3

你不能只创建一个名为onOptionsItemSelected1()的方法，并希望当你点击菜单条目发送邮件时，android会调用它。

将此方法合并到原始onOptionsItemSelected()并将其放在正确的情况下，而不是它应该工作。

Answer 4

为什么你有一个名为onOptionsItemSelected * 1 *的单独方法？

对行动项目作出反应的所有代码应位于 onOptionsItemSelected ：

public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case android.R.id.home:
            // App icon in action bar clicked; go home
            Intent intent = new Intent(this, MainScreen.class);
            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            startActivity(intent);
            return true;

        case android.R.id.email_action_item:

            final Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND); 
            (...)
        default:
            return super.onOptionsItemSelected(item);
    }
}

当我点击“发送电子邮件”菜单项时，为什么没有发生任何事情？

4 个答案: