Question

您好我正在创建一个应用程序来扫描商务卡，它有很多视图，但一个工作非常慢，它有19个按钮。我的应用程序的缓慢工作是否可能由这么多按钮引起？我试图把听众放在onCreate之外，但它没有帮助。这是我的java文件连接到这个视图：

public class Szczegoly extends Activity {
long contactID;
Bitmap contactFoto;
int imagebig=0;
int w;
Contact contact;
EditText tv1;
EditText tv2;
EditText tv3;
EditText tv4;
EditText tv5;
ImageView i;
Button b1;
Button b2;
Button b3;
Button b4;
Button b5;
Button b6;
Button b7;
Button b8;
Button b9;
Button b10;
Context to;
Button accept1;
Button accept2;
Button accept3;
Button accept4;
Button accept5;
Button cancel1;
Button cancel2;
Button cancel3;
Button cancel4;
Button cancel5;
Context context;

OnClickListener accept1listener = new OnClickListener() {       
    @Override
    public void onClick(View v) {
        if(edit_nr ==1)
        {
            contact.savedata_nr(edit_nr,tv1,tv2,tv3,tv4,tv5,context);
            closeEdit();
        }           
    }
};

OnClickListener accept2listener = new OnClickListener() {        
    @Override
    public void onClick(View v) {
        if(edit_nr ==2)
        {
            contact.savedata_nr(edit_nr,tv1,tv2,tv3,tv4,tv5,context);
            closeEdit();
        }            
    }
};

OnClickListener accept3listener = new OnClickListener() {        
    @Override
    public void onClick(View v) {
        if(edit_nr ==3)
        {
            contact.savedata_nr(edit_nr,tv1,tv2,tv3,tv4,tv5,context);
            closeEdit();
        }            
    }
};
OnClickListener accept4listener = new OnClickListener() {        
    @Override
    public void onClick(View v) {
        if(edit_nr ==4)
        {
            contact.savedata_nr(edit_nr,tv1,tv2,tv3,tv4,tv5,context);
            closeEdit();
        }            
    }
};
OnClickListener accept5listener = new OnClickListener() {        
    @Override
    public void onClick(View v) {
        if(edit_nr ==5)
        {
            contact.savedata_nr(edit_nr,tv1,tv2,tv3,tv4,tv5,context);
            closeEdit();
        }            
    }
};
OnClickListener cancel1listener = new OnClickListener() {       
    @Override
    public void onClick(View v) {
        tv1.setText(contact.FirstName);
        closeEdit();
    }
};
OnClickListener cancel2listener = new OnClickListener() {        
    @Override
    public void onClick(View v) {
        tv1.setText(contact.FirstName);
        closeEdit();
    }
};
OnClickListener cancel3listener = new OnClickListener() {        
    @Override
    public void onClick(View v) {
        tv1.setText(contact.FirstName);
        closeEdit();
    }
};
OnClickListener cancel4listener = new OnClickListener() {        
    @Override
    public void onClick(View v) {
        tv1.setText(contact.FirstName);
        closeEdit();
    }
};
OnClickListener cancel5listener = new OnClickListener() {        
    @Override
    public void onClick(View v) {
        tv1.setText(contact.FirstName);
        closeEdit();
    }
};

OnClickListener b1lisner = new OnClickListener() {          
    @Override
    public void onClick(View v) {
        if(edit_nr ==0)
        {
            finish();
        }               
    }
};
OnClickListener b2lisner = new OnClickListener() {                  
    @Override
    public void onClick(View v) {
        if(edit_nr ==0)
        {
            contact.delete();
            finish();
        }               
    }
};
OnClickListener b3lisner = new OnClickListener() {          
    @Override
    public void onClick(View v) {
        if(edit_nr ==0)
        {
        }               
    }
};
OnClickListener b4lisner = new OnClickListener() {          
    @Override
    public void onClick(View v) {
        if(edit_nr ==0)
        {
            Uri call = Uri.parse("tel:"+contact.Phone1);    
            Intent intent = new Intent(Intent.ACTION_CALL, call);
            startActivity(intent);
        }               
    }
};
OnClickListener b5lisner = new OnClickListener() {

    @Override
    public void onClick(View v) {
        if(edit_nr ==0)
        {
        }

    }
};
OnClickListener b6lisner = new OnClickListener() {          
    @Override
    public void onClick(View v) {
        if(edit_nr ==0)
        {
            if(tv1.isEnabled())
            {
                tv1.setSelected(false);
                tv1.setEnabled(false);
            }

            else
            {

                cancel1.setVisibility(Button.VISIBLE);
                accept1.setVisibility(Button.VISIBLE);
                b6.setVisibility(Button.INVISIBLE);
                tv1.setEnabled(true);
                tv1.setSelected(true);
                tv1.setFocusableInTouchMode(true);

                tv1.requestFocus();
                tv1.setSelection(tv1.getText().length());
                InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                if (inputMethodManager != null) {
                    inputMethodManager.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);
                }

            }
            edit_nr= 1;
        }
    }
};
OnClickListener b7lisner = new OnClickListener() {

    @Override
    public void onClick(View v) {
        if(edit_nr ==0)
        {
            if(tv2.isEnabled())
                tv2.setEnabled(false);
            else
            {


                cancel2.setVisibility(Button.VISIBLE);
                accept2.setVisibility(Button.VISIBLE);
                b7.setVisibility(Button.INVISIBLE);
                 tv2.setEnabled(true);
                tv2.setSelected(true);
                tv2.setFocusableInTouchMode(true);

                tv2.requestFocus();
                tv2.setSelection(tv2.getText().length());
                InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                if (inputMethodManager != null) {
                    inputMethodManager.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);
                }
            }
            edit_nr= 2;
        }

    }
};
OnClickListener b8lisner = new OnClickListener() {

    @Override
    public void onClick(View v) {
        if(edit_nr == 0)
        {
            if(tv3.isEnabled())
                tv3.setEnabled(false);
            else
            {
                cancel3.setVisibility(Button.VISIBLE);
                accept3.setVisibility(Button.VISIBLE);
                b8.setVisibility(Button.INVISIBLE);
                tv3.setEnabled(true);
                tv3.setEnabled(true);
                tv3.setSelected(true);
                tv3.setFocusableInTouchMode(true);

                tv3.requestFocus();
                tv3.setSelection(tv3.getText().length());
                InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                if (inputMethodManager != null) {
                    inputMethodManager.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);
                }
            }
            edit_nr=3;
        }

    }
};
OnClickListener b9lisner = new OnClickListener() {

    @Override
    public void onClick(View v) {
        if(edit_nr ==0 )
        {
            if(tv4.isEnabled())
                tv4.setEnabled(false);
            else
            {                   
                cancel4.setVisibility(Button.VISIBLE);
                accept4.setVisibility(Button.VISIBLE);
                b9.setVisibility(Button.INVISIBLE);
                tv4.setEnabled(true);
                tv4.setEnabled(true);
                tv4.setSelected(true);
                tv4.setFocusableInTouchMode(true);                  
                tv4.requestFocus();
                tv4.setSelection(tv4.getText().length());
                InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                if (inputMethodManager != null) {
                    inputMethodManager.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);
                }
            }                
            edit_nr= 4;
        }
    }
};
OnClickListener b10lisner = new OnClickListener() {            
    @Override
    public void onClick(View v) {
        if(edit_nr==0)
        {
            if(tv5.isEnabled())
                tv5.setEnabled(false);
            else
            {                   
                cancel5.setVisibility(Button.VISIBLE);
                accept5.setVisibility(Button.VISIBLE);
                b10.setVisibility(Button.INVISIBLE);
                tv5.setEnabled(true);
                tv5.setEnabled(true);
                tv5.setSelected(true);
                tv5.setFocusableInTouchMode(true);                  
                tv5.requestFocus();
                tv5.setSelection(tv5.getText().length());
                InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                if (inputMethodManager != null) 
                {
                    inputMethodManager.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);
                }
            }                
        edit_nr= 5;
        }
    }
};
int edit_nr=0;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_szczegoly);
    Log.d("dupa","dupa1");
    context = this;
    Intent intent = getIntent();
    contactID = intent.getLongExtra("contactID", 0);
    contact = new Contact(contactID, this);
    tv1 = (EditText) findViewById(R.id.editText1);
    tv2 = (EditText) findViewById(R.id.editText2);
    tv3 = (EditText) findViewById(R.id.editText3);
    tv4 = (EditText) findViewById(R.id.editText4);
    tv5 = (EditText) findViewById(R.id.editText5);
    i = (ImageView) findViewById(R.id.imageView1);
    b1 = (Button) findViewById(R.id.button1);
    b2 = (Button) findViewById(R.id.button2);
    b3 = (Button) findViewById(R.id.button3);
    b4 = (Button) findViewById(R.id.button4);
    b5 = (Button) findViewById(R.id.button5);
    b6 = (Button) findViewById(R.id.button6);
    b7 = (Button) findViewById(R.id.button7);
    b8 = (Button) findViewById(R.id.button8);
    b9 = (Button) findViewById(R.id.button9);
    b10 = (Button) findViewById(R.id.button10);
    tv1.setText(contact.FirstName);
    tv2.setText(contact.LastName);
    tv3.setText(contact.Phone1);
    tv4.setText(contact.Phone2);
    tv5.setText(contact.EmaiL);
    accept1 = (Button) findViewById(R.id.accept1);
    accept2 = (Button) findViewById(R.id.accept2);
    accept3 = (Button) findViewById(R.id.accept3);
    accept4 = (Button) findViewById(R.id.accept4);
    accept5 = (Button) findViewById(R.id.accept5);
    cancel1 =(Button) findViewById(R.id.cancel1);
    cancel2 =(Button) findViewById(R.id.cancel2);
    cancel3 =(Button) findViewById(R.id.cancel3);
    cancel4 =(Button) findViewById(R.id.cancel4);
    cancel5 =(Button) findViewById(R.id.cancel5);


}

public void closeEdit()
{
    tv1.setSelected(false);
    tv1.setEnabled(false);
    tv2.setSelected(false);
    tv2.setEnabled(false);
    tv3.setSelected(false);
    tv3.setEnabled(false);
    tv4.setSelected(false);
    tv4.setEnabled(false);
    tv5.setSelected(false);
    tv5.setEnabled(false);
    cancel1.setVisibility(Button.INVISIBLE);
    accept1.setVisibility(Button.INVISIBLE);
    b6.setVisibility(Button.VISIBLE);
    cancel2.setVisibility(Button.INVISIBLE);
    accept2.setVisibility(Button.INVISIBLE);
    b7.setVisibility(Button.VISIBLE);
    cancel3.setVisibility(Button.INVISIBLE);
    accept3.setVisibility(Button.INVISIBLE);
    b8.setVisibility(Button.VISIBLE);
    cancel4.setVisibility(Button.INVISIBLE);
    accept4.setVisibility(Button.INVISIBLE);
    b9.setVisibility(Button.VISIBLE);
    cancel5.setVisibility(Button.INVISIBLE);
    accept5.setVisibility(Button.INVISIBLE);
    b10.setVisibility(Button.VISIBLE);
    edit_nr=0;
}



public void onResume() {
    super.onResume();  
    Log.d("dupa","dupa");
    Point size = new Point();
    Display display = getWindowManager().getDefaultDisplay();
    display.getSize(size);
    to = this;
    w = size.x;
    contactFoto = Bitmap.createScaledBitmap(contact.photo, w, (int) (w*contact.photo.getHeight()/contact.photo.getWidth()), true);      
    i.setImageBitmap(contactFoto);
    accept1.setOnClickListener(accept1listener);        
    accept2.setOnClickListener(accept2listener);
    accept3.setOnClickListener(accept3listener);        
    accept4.setOnClickListener(accept4listener);        
    accept5.setOnClickListener(accept5listener);
    cancel1.setOnClickListener(cancel1listener);
    cancel2.setOnClickListener(cancel2listener); 
    cancel3.setOnClickListener(cancel3listener);
    cancel4.setOnClickListener(cancel4listener);
    cancel5.setOnClickListener(cancel5listener);
    b1.setOnClickListener(b1lisner);
    b2.setOnClickListener(b2lisner);
    b3.setOnClickListener(b3lisner);
    b4.setOnClickListener(b4lisner);
    b5.setOnClickListener(b5lisner);
    b6.setOnClickListener(b6lisner);
    b7.setOnClickListener(b7lisner);
    b8.setOnClickListener(b8lisner);
    b9.setOnClickListener(b9lisner);
    b10.setOnClickListener(b10lisner);

}

}

Answer 1

按钮的数量本身并不是导致速度缓慢的原因。但是，从代码中可能看起来很多来自侦听器的操作（即contact.savedata_nr）可能会在主/ UI线程上运行，这可能会导致缓慢，具体取决于调用这些方法时会发生什么。正如评论中所提到的，创建Bitmap可能是更好的任务，也可以在后台执行。

要解决此问题，您应该查看代码并查看可以在后台线程中运行的内容。可以在后台线程上完成保存等操作，然后在UI线程上执行GUI之后的任何更新。如果后台操作需要很长时间，那么建立一个进度指示器以向用户显示正在发生的事情并且屏幕不会卡住是个好主意。您可以阅读有关Android线程here的信息。

基本的例子是：

new Thread(new Runnable() 
{
    public void run() 
    {
        //put background code here
        contact.save(...)

        //after background task is finished, update the UI
        runOnUiThread(new Runnable() 
        {
            @Override
            public void run() 
            {
                //put UI code here
                textview.setText(...);
            }
        });
    }
}).start();

我的Android应用程序工作非常慢

1 个答案: