Question

我仍然在尝试学习java android所以我确信这很容易，但我正在尝试使用编辑文本重命名按钮（tabButton）从onclicklistener启动的警报中保存文本。我是否必须创建单独的布局或这将工作？

我收到错误

 final EditText input = new EditText(this);

就像我说我还在学习所以很好的解释表示赞赏。到目前为止，这是我的src。

public class MainActivity extends Activity {

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

        // Tab buttons controlled
        final Button getTabButton = (Button) findViewById(R.id.tab1);
        final AlertDialog.Builder alert = new AlertDialog.Builder(this);

        getTabButton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View view) {

                // Tab1 button was clicked.
                alert.setTitle("Title");
                alert.setMessage("Message");

                // Set an EditText view to get user input
                final EditText input = new EditText(this);
                alert.setView(input);

                alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {
                        Editable tabname = input.getText();
                        // Do something with value!
                        tabname =

                    }
                });

                alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {
                        // Canceled.
                    }
                });

                alert.show();
            }
        });

    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

Answer 1

尝试如下：

alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog, int whichButton) {

        getTabButton.settext(input.getText().toString());

    }
});

Answer 2

请尝试这种方式，希望这有助于您解决问题。

public class MainActivity extends Activity {

    private Button getTabButton;

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

        getTabButton = (Button) findViewById(R.id.tab1);
        getTabButton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(final View view) {

                AlertDialog.Builder alert = new AlertDialog.Builder(MainActivity.this);
                alert.setTitle("Title");
                alert.setMessage("Message");
                final EditText input = new EditText(MainActivity.this);
                alert.setView(input);

                alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {
                        Toast.makeText(MainActivity.this,input.getText().toString(),Toast.LENGTH_SHORT).show();
                        ((Button)view).setText(input.getText());
                    }
                });

                alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {
                        // Canceled.
                    }
                });

                alert.show();
            }
        });

    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

如何从警报创建和保存edittext？

2 个答案: