Question

从微调器中选择项目后想要打开新活动我正在为大学项目创建应用程序，但却被困在这里这是代码

这是布局中的微调器

<Spinner
    android:layout_width="match_parent"
    android:id="@+id/spin"
    android:layout_height="wrap_content"
    android:layout_marginRight="48dp"
    android:layout_marginEnd="48dp"
    android:layout_marginTop="103dp"
    android:layout_below="@+id/textView"
    android:layout_alignRight="@+id/textView"
    android:layout_alignEnd="@+id/textView"
    >
</Spinner>

这是strings.xml中的项目

<resources>
<string name="app_name">Spinner</string>
<string name="select_bikes">Bike Reviews</string>
<string-array name="bike_names">

    <item>Ducati Panigale</item>
    <item>Suzuki Hayabusa</item>
    </string-array>

这是我想要的代码，当我点击项目

时，它可以打开另一个活动

 Spinner spinner;
ArrayAdapter<CharSequence>adapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    spinner=(Spinner)findViewById(R.id.spin);
    adapter=ArrayAdapter.createFromResource(this,R.array.bike_names,android.R.layout.simple_spinner_item);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_item);
    spinner.setAdapter(adapter);
    spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
            Toast.makeText(getBaseContext(),adapterView.getItemAtPosition(i)+" Selected",Toast.LENGTH_LONG).show();

        }

        @Override
        public void onNothingSelected(AdapterView<?> adapterView) {

        }
    });
}

Answer 1

@Override
    public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
        Toast.makeText(getBaseContext(),adapterView.getItemAtPosition(i)+" Selected",Toast.LENGTH_LONG).show();

         startActivity(new Intent(ActivityName.this,RecieverActivity.class));

    }

Answer 2

尝试使用 Intent 启动活动

intent是要执行的操作的抽象描述。它可以与startActivity一起使用来启动活动。

spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
            Toast.makeText(getBaseContext(),adapterView.getItemAtPosition(i)+" Selected",Toast.LENGTH_LONG).show();

            if(i==0){
                Intent  intent = new Intent(YourActivity.this, WebViewActivity.class);
                intent.putExtra("URl","https://stackoverflow.com/");
                startActivity(intent);
            }else if(i==1){
                Intent  intent = new Intent(YourActivity.this, WebViewActivity.class);
                intent.putExtra("URl","https://stackoverflow.com/");
                startActivity(intent);
            }

        }

        @Override
        public void onNothingSelected(AdapterView<?> adapterView) {

        }
    });

如何从微调器中选择项目时打开新活动？单击微调器

2 个答案: