Android之AlertDialog Demo（20190115）

Android之AlertDialog Demo（20190115）

android.support.v7.app.AlertDialog 的使用

源码下载：https://github.com/watayouxiang/AlertDialogDemo

简单的AlertDialog

public void showSimpleDialog(View view) {
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setIcon(R.mipmap.ic_launcher);
    builder.setTitle("Title");
    builder.setMessage("Message");
    builder.setNegativeButton("取消", null);
    builder.setPositiveButton("确定", null);
    builder.setNeutralButton("中性", null);
    builder.show();
}

setView

public void setView(View view) {
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle("Title");
    builder.setMessage("Message");
    builder.setView(new EditText(this));
    builder.setNegativeButton("取消", null);
    builder.setPositiveButton("确定", null);
    builder.show();
}

setSingleChoiceItems

public void setSingleChoiceItems(View view) {
    final AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle("单选列表");
    builder.setSingleChoiceItems(
            new String[]{"11111", "22222", "33333", "44444", "55555"},
            0,
            new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {

                }
            }
    );
    builder.setNegativeButton("取消", null);
    builder.setPositiveButton("确定", null);
    builder.show();
}

setMultiChoiceItems

public void setMultiChoiceItems(View view) {
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle("多选列表");
    builder.setMultiChoiceItems(
            new String[]{"11111", "22222", "33333", "44444", "55555"},
            new boolean[]{false, true, true, false, false},
            new DialogInterface.OnMultiChoiceClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which, boolean isChecked) {
                    Toast.makeText(mContext, "which " + which + ", isChecked " + isChecked, Toast.LENGTH_SHORT).show();
                }
            }
    );
    builder.setNegativeButton("取消", null);
    builder.setPositiveButton("确定", null);
    builder.show();
}

setItems

public void setItems(View view) {
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle("Title");
    builder.setItems(
            new String[]{"11111", "22222", "33333", "44444", "55555"},
            new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    Toast.makeText(mContext, "which " + which, Toast.LENGTH_SHORT).show();
                }
            }
    );
    builder.setNegativeButton("取消", null);
    builder.setPositiveButton("确定", null);
    builder.show();
}

自定义Dialog

public void showMyDialog(View view) {
  AlertDialog.Builder builder = new AlertDialog.Builder(this);
    final AlertDialog alertDialog = builder.create();
    //取消外部点击隐藏
    alertDialog.setCanceledOnTouchOutside(false);
    //设置取消监听
    alertDialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
        @Override
        public void onCancel(DialogInterface dialog) {
            Toast.makeText(mContext, "onCancel", Toast.LENGTH_SHORT).show();
        }
    });
    //设置自定义布局
    View rootView = getLayoutInflater().inflate(R.layout.view_my_dialog, null);
    rootView.findViewById(R.id.tv_cancel).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            alertDialog.cancel();
        }
    });
    alertDialog.setView(rootView);
    alertDialog.show();
    //设置弹窗参数（注意：弹窗样式修改必须在 dialog.show() 方法后调用，否则不生效）
    Window window = alertDialog.getWindow();
    if (window != null) {
        window.setGravity(Gravity.CENTER);
        window.setLayout(WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.WRAP_CONTENT);
        //dialog即使没有设置四周的margin也有margin，可以设置给dialog设置个background来解决
        window.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
        //宽度为屏幕宽度的80%
        WindowManager.LayoutParams params = window.getAttributes();
        params.width = (int) (getWindowManager().getDefaultDisplay().getWidth() * 0.8f);
        window.setAttributes(params);
    }
}

view_my_dialog.xml