好记性不如烂笔杆android学习笔记<十二> Toast的使用

24，//Toast的使用
<1>//Toast,界面上显示一个提示，长时间和短时间显示 ，在toast.xml文件中2个button

public class SubToastActivity extends Activity{
    private Button shortButton = null;
    private Button longButton = null;
    private static int NOTIFICATION_ID = R.layout.activity_toast;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_toast);
        
        shortButton = (Button)findViewById(R.id.short_time_but);
        shortButton.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View v) {
                setTitle("短时间显示Toast");
                showToast(Toast.LENGTH_SHORT);
            }
        });
        longButton = (Button)findViewById(R.id.long_time_but);
        longButton.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View v) {
                setTitle("长时间显示Toast");
                showToast(Toast.LENGTH_LONG);
            }
        });
    }
    protected void showToast(int type) {
        View view = inflateView(R.layout.toast);
        TextView tv = (TextView) view.findViewById(R.id.content);
        tv.setText("Android应用开发Android应用开发Android应用开发Android应用开发");
        Toast toast = new Toast(this);
        toast.setView(view);
        toast.setDuration(type);
        toast.show();
    }
    private View inflateView(int resource){
        LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        return vi.inflate(resource, null);
    }

<2>可以输出Image的Toast

public class ShowImageToast extends Activity{

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.showimage);
        Toast showImageToast = new Toast(this);
        ImageView imageView = new ImageView(this);
        imageView.setImageResource(R.drawable.default_icon);
        showImageToast.setView(imageView);
        showImageToast.setDuration(Toast.LENGTH_LONG);
        showImageToast.show();
    }
}

 

<3>输出字符可以是字符串连接
Toast.makeText(DearToast.this, str2+Str.toString()+str3,Toast.LENGTH_LONG).show();