java - 如何判断Button是否被点击

Question

我必须检查按钮是否被单击。如果单击的应用程序必须执行一项任务，如果没有，应用程序必须执行另一项任务。我尝试这样做，但没有收到连接错误，我已将其放在 catch block 中的代码末尾。

 protected void onCreate(Bundle savedInstanceState) {
    PracticeVO practiceObj;

    try {

        setTitle("Klarity");
        setPrefBtn = (Button) findViewById(R.id.setPrefBtn);

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_klarity_home);

        /*
         * asynchronous calls
         */

        StrictMode.ThreadPolicy policy = new     StrictMode.ThreadPolicy.Builder()
                .permitAll().build();
        StrictMode.setThreadPolicy(policy);

        final ConnectionHelper con = new ConnectionHelper();
        /*
         * It will connect to DB and fetches the Practice Information
         */
        if (Btnclicked == false) {

            String allPracticesStr = null;

这里我将 boolean 变量“Btnclicked”设置为 true。

 setPrefBtn.setOnClickListener(new View.OnClickListener() {
                public void onClick(View v) {
                    Btnclicked=true;
                    Intent setPrefIntent = new Intent(KlarityHome.this,
                            SetPreferences.class);
                    startActivity(setPrefIntent);

                }
            });

但是执行完之后，光标直接到这里，显示“无连接”。

catch (Exception ex) {
        Context context = getApplicationContext();
        CharSequence text = "There is some error in application";
        int duration = Toast.LENGTH_LONG;

        Toast toast = Toast.makeText(context, text, duration);
        toast.show();
        System.out.println("no connection");
    }

}

任何人都有解决方案。

Answer 1

正如你所说

"the button is clicked or not.if clicked application has to do one task and if noapplication has to do another task" so, if i were you, i'll put 2 radio buttons, every one with the text of the task you want to do, and add a listener for them, like this:

radiobutton1.setOnCheckedChangeListener(new RadioButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            radiobutton2.setChecked(false);
        }
    });

radiobutton2.setOnCheckedChangeListener(new RadioButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                radiobutton1.setChecked(false);
            }
    });

最后，在按钮中执行您想要执行的任务:

    Button.setOnClickListener(new Button.OnClickListener() {
                public void onClick(View v) {
    if(radiobutton1.isChecked){
    //do task 1
}else{
//do task2}
    }
    });