java - Java，根据额外的字符串更改ContentView

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我使用Extra通过意图传递了对列表视图的选择，但没有选择它。

以下代码底部的日志表明，它正在将正确的名称传递给此类文件，例如cous cous，意大利面，蛋糕等-但它不会在if语句中显示日志，也不会加载内容视图。

有任何想法吗？

public class RecipePage extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        String recipeName = (String) getIntent().getStringExtra("RecipeName");
        if(recipeName == "Cous Cous"){
            setContentView(R.layout.activity_couscous);
            Log.d("Joe", "1");
        }
        if(recipeName == "Rice"){
            setContentView(R.layout.activity_rice);
            Log.d("Joe", "2");
        }
        if(recipeName == "Burgers"){
            setContentView(R.layout.activity_burgers);
            Log.d("Joe", "3");
        }
        if(recipeName == "Pasta"){
            setContentView(R.layout.activity_pasta);
            Log.d("Joe", "4");
        }
        if(recipeName == "Chicken"){
            setContentView(R.layout.activity_chicken);
            Log.d("Joe", "5");
        }
        if(recipeName == "Cake"){
            setContentView(R.layout.activity_cake);
            Log.d("Joe", "6");
        }
        if(recipeName == "Roast"){
            setContentView(R.layout.activity_roast);
            Log.d("Joe", "7");
        }
        if(recipeName == "Lasagne"){
            setContentView(R.layout.activity_lasagne);
            Log.d("Joe", "8");
        }

        Log.d("Joe", "Recipe =" + recipeName);

    }
}

最佳答案

为了比较字符串，您应该使用equals（）方法。