Android如何自定义Toast？and 四种AleterDialog的用法

Toast

自定义Toast

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    private Button mButton1;
    private Button mButton2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mButton1 = (Button) findViewById(R.id.button1);
        mButton1.setOnClickListener(this);

        mButton2 = (Button) findViewById(R.id.button2);
        mButton2.setOnClickListener(this);

    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {

            case R.id.button1:

                Toast toast = Toast.makeText(getApplicationContext(), "你真傻，", Toast.LENGTH_LONG);
                 //添加富文本
                Spanned spanned = Html.fromHtml("我<img src=''/>是<font color='#50f0'>toast</font>,你真傻", new Html.ImageGetter() {
                    @Override
                    public Drawable getDrawable(String source) {
                        Drawable drawable = getResources().getDrawable(R.mipmap.tangyan);
                        drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());

                        return drawable;
                    }
                }, null);
                //更改文本
                toast.setText(spanned);
                //设置显示位置
                //zh
                toast.setDuration(Toast.LENGTH_LONG);
                toast.setGravity(Gravity.CENTER_HORIZONTAL, 0, 0);
                toast.show();
                break;
            case R.id.button2:
                Toast toast2 = new Toast(getApplicationContext());

                LayoutInflater inflater = getLayoutInflater();

                View toastView = inflater.inflate(R.layout.my_toast_layout, null);
                TextView textViewTitle = (TextView) toastView.findViewById(R.id.title);
                TextView textViewMessage = (TextView) toastView.findViewById(R.id.textview_message);
                textViewTitle.setText("标题");
                textViewMessage.setText("内容");
                toast2.setView(toastView);
                toast2.setDuration(Toast.LENGTH_LONG);
                toast2.show();
                break;
            default:
                break;

        }
    }
}

Dialog

简单的Dialog

带选择项的Dialog

单选项Dialog

多项选择Dialog

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    private Button button1;
    private Button button2;
    private String[] mData = new String[]{"选项1", "选项2", "选项3", "选项4"};
    private Button button3;
    private String msex[] = new String[]{"男", "女", "其他"};
    private String sex;
    private Button button4;
    private String[] mSport = new String[]{"篮球", "足球", "游泳", "跑步", "健身"};
    private boolean isCheckedHobby[] = new boolean[mSport.length];

    private StringBuffer hobby;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //setCountView必须放前面，否则空指针
        setContentView(R.layout.activity_main);
        //总是写成   button1. findViewById(R.id.button1);
        button1 = (Button) findViewById(R.id.button1);
        button1.setOnClickListener(this);

        button2 = (Button) findViewById(R.id.button2);
        button2.setOnClickListener(this);

        button3 = (Button) findViewById(R.id.button3);
        button3.setOnClickListener(this);

        button4 = (Button) findViewById(R.id.button4);
        button4.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {

            case R.id.button1:
                //传getApplicationContext()会出错
                AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                builder.setIcon(R.mipmap.ic_launcher).setTitle("标题").setMessage("内容").setNegativeButton("Negative", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(getApplicationContext(), "点击了Negative按钮", Toast.LENGTH_LONG).show();

                    }
                }).setNeutralButton("Neutral", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(getApplicationContext(), "点击了NeutralButton按钮", Toast.LENGTH_LONG).show();
                    }
                }).setPositiveButton("Positive", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(getApplicationContext(), "点击了PositiveButton按钮", Toast.LENGTH_LONG).show();
                    }
                }).create().show();
                break;
            case R.id.button2:

                AlertDialog.Builder builder1 = new AlertDialog.Builder(MainActivity.this);
                builder1.setTitle("选择的Dialog");
                builder1.setItems(mData, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(getApplicationContext(), "选中" + (which + 1) + "", Toast.LENGTH_LONG).show();
                    }
                });
                AlertDialog dialog = builder1.create();
                dialog.show();
                break;
            case R.id.button3:

                AlertDialog.Builder builder2 = new AlertDialog.Builder(MainActivity.this);
                builder2.setTitle("请选择性别");
                //0位默认第一个选项
                builder2.setSingleChoiceItems(msex, 0, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(getApplicationContext(), "您选择性别为" + msex[which] + "", Toast.LENGTH_SHORT).show();
                        //sex就是用来传值的
                        sex = msex[which];
                    }
                });

                builder2.setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        button3.setText("您选择性别为" + sex);
                    }
                    //create().show();也可以不加如果此处添加了，下面AlertDialog dialog1=builder2.create();
                    //  dialog1.show();也存在的话，，界面上会执行两遍
                });

                builder2.setNeutralButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {

                    }
                });

                AlertDialog dialog1 = builder2.create();
                dialog1.show();
                break;

            case R.id.button4:

                AlertDialog.Builder builder3 = new AlertDialog.Builder(MainActivity.this);
                builder3.setTitle("请选择爱好");
                builder3.setMultiChoiceItems(mSport, isCheckedHobby, new DialogInterface.OnMultiChoiceClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which, boolean isChecked) {
                        isCheckedHobby[which] = isChecked;

                    }
                });

                builder3.setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        hobby = new StringBuffer();
                        for (int i = 0; i < isCheckedHobby.length; i++) {
                            if (isCheckedHobby[i]) {
                                hobby.append(mSport[i]);
                            }

                        }
                        button4.setText("您选择愛好为" + hobby);
                    }
                    //create().show();也可以不加如果此处添加了，下面AlertDialog dialog1=builder2.create();
                    //  dialog1.show();也存在的话，，界面上会执行两遍
                });

                builder3.setNeutralButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {

                    }
                });

                AlertDialog dialog3 = builder3.create();
                dialog3.show();

                break;

            default:
                break;

        }

    }
}